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B1 verb /ˌɪntərˈækt/

interact

interagieren
Meaning
to communicate or work together with someone or something
Example
Students interact with teachers during class discussions.
Die Schüler interagieren während der Unterrichtsdiskussionen mit den Lehrern.
C1 adjective /ɪnˈdʌstriəs/

industrious

fleißig
Meaning
Hardworking and diligent in one's duties.
Example
She is an industrious student who always completes her assignments on time.
Sie ist eine fleißige Studentin, die immer ihre Aufgaben rechtzeitig erledigt.
C1 adjective /ˈɪntrɪkət/

intricate

komplex
Meaning
very detailed, complex, and difficult to understand
Example
The artist created an intricate pattern on the wall.
Der Künstler hat ein komplexes Muster an die Wand gemalt.
C1 noun ˌɪndɪˈspensəbl̩ ˈkɒmpɪtənsi

indispensable competency

unverzichtbare Kompetenz
Meaning
Essential skill or ability that cannot be done without; a crucial capability that is absolutely necessary.
Example
Digital literacy is an indispensable competency in the 21st century.
Digitale Kompetenz ist eine unverzichtbare Kompetenz im 21. Jahrhundert.
A2 noun /ˈaɪ.lənd/

Island

Insel
Meaning
a piece of land completely surrounded by water
Example
We visited a beautiful island during our vacation.
Wir haben während unseres Urlaubs eine schöne Insel besucht.
C2 noun /ˈɪrɪɡənt/

irrigant

Bewässerungsflüssigkeit
Meaning
A liquid used for irrigation, especially in medical or agricultural contexts.
Example
The doctor used a sterile irrigant during the procedure.
Der Arzt verwendete während des Verfahrens ein steriles Bewässerungsflüssigkeit.
C2 adjective /ˌaɪsəʊˈθɜːrməl/

isothermal

isotherm
Meaning
Having or maintaining equal or constant temperature.
Example
The experiment was conducted under isothermal conditions.
Das Experiment wurde unter isothermen Bedingungen durchgeführt.
B2 adjective /ˈɪrɪteɪtɪd/

irritated

gereizt
Meaning
feeling annoyed or impatient; having inflamed or sore physical condition
Example
She felt irritated by the constant noise outside her window.
Sie war durch den ständigen Lärm gereizt.
C2 adjective /ˌɪrɪˈlɪdʒəs/

irreligious

gotteslästerlich
Meaning
Indifferent or hostile to religion
Example
Some people in the community consider him irreligious because he never attends religious services.
Einige Menschen in der Gemeinschaft betrachten ihn als gottlos, weil er nie religiösen Gottesdiensten beiwohnt.
C2 noun /ɪmˈprɑːvɪdəns/

improvidence

Vorsehenslosigkeit
Meaning
Lack of foresight or care for future needs.
Example
His improvidence led to financial difficulties.
Seine Vorsehenslosigkeit führte zu finanziellen Schwierigkeiten.
C1 noun /ɪmˈpɜːrtɪnəns/

impertinence

Unverschämtheit
Meaning
lack of respect; rudeness
Example
The teacher was shocked by the student's impertinence.
Der Lehrer war schockiert über die Unverschämtheit des Schülers.
B1 verb ɪnˈkriːsɪŋ

increasing

steigend
Meaning
Becoming or making greater in size, amount, intensity, or degree; growing.
Example
Increasing awareness about education is necessary.
Das Bewusstsein über Bildung zu steigern ist notwendig.
C1 noun ˌɪn.toʊˈneɪ.ʃən

intonation

Intonation
Meaning
The rise and fall of tone in speech and pronunciation.
Example
Proper intonation enhances the clarity of a speech.
Die richtige Intonation verbessert die Klarheit einer Rede.
C1 adjective /ˌɪntəˈrɑːɡətɪv/

interrogative

interrogativ
Meaning
Relating to or conveying a question; in grammar, used to form questions.
Example
She raised an interrogative eyebrow when she heard the news.
Sie hob eine interrogative Augenbraue, als sie die Nachricht hörte.
B2 noun /ˈɪntərfeɪs/

interface

Schnittstelle
Meaning
a point where two systems, subjects, or organizations meet and interact
Example
The user interface is designed to be intuitive and user-friendly.
Die Benutzeroberfläche ist so gestaltet, dass sie intuitiv und benutzerfreundlich ist.
C2 adjective /ˌɪɡ.nəˈmɪn.i.əs/

ignominious

ignominös
Meaning
Marked by shame, disgrace, or humiliation.
Example
The team suffered an ignominious defeat in the finals.
Das Team erlitt eine ignominöse Niederlage im Finale.
C1 noun /ɪnˈækjʊrəsi/

inaccuracy

Ungenauigkeit
Meaning
lack of accuracy or precision; an incorrect or wrong detail
Example
The report contained several factual inaccuracies.
Der Bericht enthielt mehrere Ungenauigkeiten.
C1 noun /ˌɪn.dɪˈsɪʒ.ən/

Indecision

Unentschlossenheit; Zweifel; Zögern
Meaning
the inability to make decisions quickly; uncertainty about what to do
Example
Her indecision about which job offer to accept caused her to miss both opportunities.
Ihre Unentschlossenheit, welches Jobangebot sie annehmen sollte, führte dazu, dass sie beide Gelegenheiten verpasste.
C2 adjective /ɪˈnɪmɪkəl/

inimical

feindlich / ungünstig
Meaning
tending to obstruct or harm; unfriendly or hostile
Example
The policy was inimical to the country's economic growth.
Die Politik war ungünstig für das Wirtschaftswachstum des Landes.
A2 noun /ˈɪntəvjuː/

interview

Vorstellungsgespräch
Meaning
A meeting of people face to face, especially for consultation.
Example
The interview was conducted in a calm and professional manner.
Das Vorstellungsgespräch wurde ruhig und professionell geführt.
B2 adjective aɪˈkɒnɪk

iconic

ikonisch
Meaning
Very famous or popular, especially being considered to represent particular opinions or a particular time.
Example
The line "It was the best of times..." is iconic.
Der Satz "Es war die beste Zeit..." ist ikonisch.
C1 noun ˌɪm.pʌlˈsɪv.ɪ.ti

impulsivity

Impulsivität
Meaning
The tendency to act quickly and without thought or care; lack of self-control.
Example
His impulsivity led him to make reckless choices.
Seine Impulsivität führte ihn dazu, unüberlegte Entscheidungen zu treffen.
B2 verb ˈɪmplɪment

implement

umsetzen
Meaning
To put a decision or plan into effect; to execute or apply.
Example
Implementing educational policies is essential for progress.
Es ist entscheidend, Bildungspolitiken umzusetzen, um Fortschritte zu erzielen.
C2 noun /ɪnˈtɜːrstɪs/

interstice

Spalt
Meaning
a small space that lies between things
Example
Light filtered through the narrow interstices of the wall.
Das Licht filterte durch die schmalen Spalten der Wand.
B1 verb ˈɪndɪkeɪts

indicates

zeigt an
Meaning
Point out; show; be a sign or symptom of; suggest as a desirable or necessary course of action.
Example
The rising trend indicates an urgent need for action.
Der steigende Trend zeigt einen dringenden Handlungsbedarf an.
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

genialität
Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
Seine Ingenuität führte zu bahnbrechenden Innovationen.
C1 adjective /ɪnˈsɪdiəs/

insidious

heimtückisch
Meaning
Proceeding in a gradual, subtle way but with harmful effects.
Example
The insidious spread of misinformation can damage trust.
Die heimtückische Verbreitung von Fehlinformationen kann das Vertrauen schädigen.
C1 noun /ˌɪnkwɪˈzɪʃən/

inquisition

Inquisition
Meaning
A prolonged and intense questioning or investigation, often harsh in nature.
Example
The journalist faced an inquisition from the panel about his sources.
Der Journalist wurde einem harten Verhör durch das Panel über seine Quellen unterzogen.
C1 adjective /ɪnˈses.ənt/

incessant

unaufhörlich
Meaning
Continuing without pause or interruption; constant.
Example
The incessant noise from the construction site made it hard to concentrate.
Der unaufhörliche Lärm von der Baustelle erschwerte es, sich zu konzentrieren.
C1 noun /ɪˈmɜː.ʃən/

immersion

Eintauchen
Meaning
Complete engagement in an environment or experience.
Example
Immersion in VR games makes users feel like they are inside the virtual world.
Das Eintauchen in VR-Spiele lässt die Benutzer das Gefühl haben, als wären sie in der virtuellen Welt.
C2 adjective /ˌɪnɪkˈstɛnsəbl/

inextensible

undehnbar
Meaning
Not capable of being stretched or extended.
Example
This rope is made of an inextensible material.
Dieses Seil ist aus einem undehnbaren Material gemacht.
C2 noun /ɪnˈtɛnʃən/

intension

innere Bedeutung
Meaning
The internal content of a concept; the set of attributes implied by a word or phrase.
Example
The intension of the word 'dog' includes being a mammal and domesticated.
Die Intension des Wortes 'Hund' umfasst, ein Säugetier und domestiziert zu sein.
B2 verb /ɪnˈkwaɪər/

inquire

fragen
Meaning
to ask; to investigate
Example
She inquired about the job opening.
Sie fragte nach der Stellenanzeige.
B2 noun /ˈɪn.flu.ən.sər/

Influencer

Influencer, Person, die Produkte bewirbt
Meaning
A person with the ability to influence potential buyers of a product or service by promoting or recommending the items on social media.
Example
Social media influencers shape consumer preferences.
Social-Media-Influencer beeinflussen die Vorlieben der Verbraucher.
C1 adjective /ˌaɪdiəˈlɪstɪk/

Idealistic

idealistisch
Meaning
pursuing high principles or ideals; unrealistically optimistic
Example
She has an idealistic view of changing the world.
Sie hat eine idealistische Sicht darauf, die Welt zu verändern.
B2 adjective /aɪˈdentɪkəl/

Identical

identisch; genau gleich
Meaning
exactly the same; not different in any way
Example
The twins look completely identical to each other.
Die Zwillinge sehen völlig identisch aus.
B1 adjective /ˈɪrɪteɪtɪŋ/

irritating

reizend
Meaning
causing annoyance, impatience, or mild anger
Example
The constant noise from the street is extremely irritating.
Der ständige Lärm von der Straße ist extrem reizend.
C2 noun /ɪnˌtɜːrpəˈleɪʃən/

interpolation

Interpolation
Meaning
The act of inserting something into a text or estimating values within a sequence of data.
Example
The scientist used interpolation to predict the missing data points.
Der Wissenschaftler verwendete Interpolation, um die fehlenden Datenpunkte vorherzusagen.
C2 noun (compound/erroneous entry) /ɪnˈɛksərəbl ɑːrmi/

inexorableinexorablearmy

unaufhaltsame Armee
Meaning
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
Example
The rebels feared the inexorable army approaching their stronghold.
Die Rebellen fürchteten die unaufhaltsame Armee, die sich ihrer Festung näherte.
B2 adverb /aɪˈrɒnɪkli/

ironically

ironischerweise
Meaning
in a way that is contrary to what is expected or intended
Example
Ironically, the fire station burned down.
Ironischerweise brannte die Feuerwache nieder.
B2 adjective /ɪmˈper.ə.tɪv/

imperative

imperativ
Meaning
Of vital importance; crucial; giving or expressing a command.
Example
It is imperative to address the climate crisis immediately.
Es ist imperative, die Klimakrise sofort anzugehen.
B2 noun /ˈaɪkɒn/

icon

Ikone, Symbol
Meaning
A person or thing regarded as a symbol of something, or a graphic symbol on a screen.
Example
The singer became a cultural icon.
Der Sänger wurde zu einer kulturellen Ikone.
C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

unentschieden
Meaning
Not leading to a definite result or decision.
Example
The investigation remained inconclusive due to a lack of evidence.
Die Untersuchung blieb unentschieden wegen eines Beweisfehlens.
C1 adjective /ˌɪrɪˈvɜːrsəbl/

irreversible

irreversibel
Meaning
Not able to be undone, changed, or reversed.
Example
The damage caused by the fire was irreversible.
Der durch das Feuer verursachte Schaden war irreversibel.
B2 noun /ɪmˈpɒlɪtnəs/

impoliteness

Unhöflichkeit
Meaning
lack of good manners or courtesy; rude behavior
Example
His impoliteness towards the guests shocked everyone.
Seine Unhöflichkeit gegenüber den Gästen schockierte alle.
C1 adjective /ɪnˈdɪɡnənt/

indignant

empört
Meaning
Feeling or showing anger at something considered unfair or unjust.
Example
She was indignant when accused of cheating.
Sie war empört, als sie des Schummelns beschuldigt wurde.
C1 adjective /ˌɪnsɪˈdɛntəl/

incidental

nebenkosten
Meaning
happening as a minor part or in connection with something else
Example
Incidental expenses like snacks and tips were included in the bill.
Nebenkosten wie Snacks und Trinkgelder wurden in die Rechnung aufgenommen.
C2 verb /ɪnˈsteɪt/

instate

einsetzen
Meaning
To set up in position, office, or authority.
Example
The board decided to instate her as the new director.
Der Vorstand entschied, sie als neue Direktorin zu installieren.
C2 adjective /ˌɪrɪˈkɒnsɪləbl/

irreconcilable

unversöhnlich
Meaning
impossible to make compatible or bring into harmony; unable to resolve differences
Example
The couple separated due to irreconcilable differences.
Das Paar trennte sich aufgrund unversöhnlicher Differenzen.
C1 adjective /ɪˈlʌstriəs/

illustrious

berühmt
Meaning
Well known, respected, and admired for past achievements.
Example
She had an illustrious career in medicine.
Sie hatte eine berühmte Karriere in der Medizin.
B2 noun /ɪnˈspekʃən/

inspection

Inspektion
Meaning
a careful examination of something, especially to check that it is correct or safe
Example
The building passed the safety inspection last week.
Das Gebäude hat die Sicherheitsinspektion letzte Woche bestanden.
C2 adjective /ɪˈmɒdɪst/

immodest

überheblich / unanständig
Meaning
lacking humility or decency; excessively proud or improper
Example
His immodest remarks offended the audience.
Seine überheblichen Bemerkungen beleidigten das Publikum.
B2 adjective /ɪˈmjuːn/

immune

immunisiert
Meaning
protected from disease or from the effects of something
Example
Children who are vaccinated are immune to many diseases.
Kinder, die geimpft sind, sind gegen viele Krankheiten immun.
C2 verb /ɪnˈveɪ/

inveigh

heftig kritisieren
Meaning
To speak or write about something with great hostility and criticism.
Example
He inveighed against the corruption in government.
Er kritisierte heftig die Korruption in der Regierung.
C2 noun /ɪnˈsuːsiəns/

insouciance

Sorglosigkeit
Meaning
Casual lack of concern; indifference.
Example
She carried herself with an air of insouciance, unbothered by the challenges ahead.
Sie ging mit einer Haltung der Sorglosigkeit, unbesorgt über die bevorstehenden Herausforderungen.
C2 noun /ˈɪnˌɡreɪt/

ingrate

Undankbarer
Meaning
An ungrateful person; someone who shows no appreciation.
Example
He worked hard for his friend, but the ingrate never thanked him.
Er arbeitete hart für seinen Freund, aber der Undankbare hat ihm nie gedankt.
B2 noun ˈɪnər strɛŋkθ

inner strength

innere Stärke
Meaning
Mental or spiritual power that helps a person cope with difficulties.
Example
Community service fosters inner strength in individuals.
Gemeinnützige Arbeit fördert die innere Stärke in Einzelpersonen.
C2 noun /ɪnˈtɛstəsi/

intestacy

Tod ohne Testament
Meaning
The condition of dying without having made a valid will.
Example
His estate was divided according to the laws of intestacy.
Sein Vermögen wurde gemäß den Gesetzen der Intestaz vererbt.
B2 adjective /ˌɪnfluˈenʃəl/

Influential

einflussreich; mächtig
Meaning
having great influence on someone or something; powerful; persuasive
Example
She is an influential leader in the community.
Sie ist eine einflussreiche Führungskraft in der Gemeinschaft.
C2 noun /ˌɪnkrʌˈsteɪʃən/

incrustation

Kruste
Meaning
a crust or hard coating formed on the surface of something
Example
The old pipes were blocked due to heavy incrustation of minerals.
Die alten Rohre waren aufgrund einer starken Verkrustung von Mineralien blockiert.
C2 noun /ˌɪlɪbəˈræləti/

illiberality

Intoleranz
Meaning
The quality of being illiberal; lack of tolerance or generosity.
Example
The illiberality of the new laws alarmed the citizens.
Die Illiberalität der neuen Gesetze alarmierte die Bürger.
C2 adjective /ˌɪnˌɑːpərˈtuːn/

inopportune

ungünstiger Moment
Meaning
Happening at a bad or inconvenient time.
Example
His call came at the most inopportune moment.
Sein Anruf kam im ungünstigsten Moment.
A2 adverb /ˌɪnˈdɔːrz/

indoors

drinnen
Meaning
inside a building; within an enclosed space
Example
Because of the rain, everyone stayed indoors.
Wegen des Regens blieben alle drinnen.
C1 verb /ɪnˈfjuːz/

infuse

infundieren
Meaning
to fill or spread through something; to instill a quality, idea, or feeling
Example
The teacher tried to infuse her students with a love for reading.
Die Lehrerin versuchte, ihren Schülern eine Liebe zum Lesen zu infundieren.
C2 adverb /ˌɪnəzˈmʌtʃ/

inasmuch

insofern
Meaning
To the extent that; considering that.
Example
Inasmuch as you are their teacher, you should guide them carefully.
Insofern du ihr Lehrer bist, solltest du sie sorgfältig anleiten.
C1 noun /ɪˈnɜː.ʃə/

Inertia

Inertie; Bewegungsmangel
Meaning
a tendency to do nothing or remain unchanged; lack of activity or movement
Example
The team's inertia prevented them from adapting to the rapidly changing market conditions.
Die Inertie des Teams verhinderte, dass es sich an die sich schnell ändernden Marktbedingungen anpasste.
C2 adjective /ɪnˈsɪpɪd/

insipid

geschmacklos
Meaning
lacking flavor, interest, or excitement; dull
Example
The soup was insipid and needed more seasoning.
Die Suppe war geschmacklos und brauchte mehr Gewürze.
A2 pronoun /ɪtˈsɛlf/

itself

selbst
Meaning
Used to emphasize the thing just mentioned; by its own power or effort.
Example
The cat cleaned itself after eating.
Die Katze putzte sich selbst nach dem Essen.
C2 noun /ˌɪn.strəˈmɛn.təl.ɪst/

instrumentalist

Instrumentalist
Meaning
A person who plays a musical instrument.
Example
The instrumentalist played a beautiful solo on the violin.
Der Instrumentalist spielte ein schönes Solo auf der Violine.
C1 noun /ˌɪntərˈmɪʃən/

intermission

Pause
Meaning
A pause or break, especially during a performance or event.
Example
The play had a twenty-minute intermission.
Das Stück hatte eine zwanzigminütige Pause.
C2 noun /ˈaɪsinəs/

iciness

Kälte
Meaning
The state of being cold in manner or temperature.
Example
There was a distinct iciness in his voice.
Es war eine deutliche Kälte in seiner Stimme.
C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

unwiederbringlicher Schaden
Meaning
Harm or injury that cannot be undone or repaired.
Example
Climate change causes irreversible damage to ecosystems.
Der Klimawandel verursacht unwiederbringlichen Schaden an Ökosystemen.
B2 adjective /ˌɪntərˈmiːdiət/

intermediate

mittelstufig
Meaning
Coming between two things in time, place, or order; in the middle level or stage.
Example
She is taking an intermediate-level French course.
Sie nimmt einen Französischkurs auf mittlerem Niveau.
C2 adjective ˌɪn.ɪ.fɪˈkeɪ.ʃəs

inefficacious

ineffektiv
Meaning
Not producing any or the desired effect; ineffective.
Example
The treatment was inefficacious in curing the disease.
Die Behandlung war ineffektiv bei der Heilung der Krankheit.
C1 adjective /ɪˈrɛfjʊtəbəl/

Irrefutable

unwiderlegbar
Meaning
impossible to deny or disprove; undeniable
Example
The evidence against him was irrefutable.
Der Beweis gegen ihn war unwiderlegbar.
C1 verb /ɪmˈbɛd/

imbed

einbetten
Meaning
To fix firmly or deeply in a surrounding mass.
Example
The journalist imbedded himself with the troops to report firsthand.
Der Journalist hat sich mit den Truppen eingebettet, um aus erster Hand zu berichten.
B1 noun /ɪmˈpruːvmənt/

improvement

verbesserung
Meaning
the act of making something better
Example
There has been a significant improvement in his health.
Es gab eine signifikante Verbesserung seiner Gesundheit.
A2 verb /ɪnˈvaɪt/

invite

einladen
Meaning
to ask someone to come to an event or to do something
Example
We should invite all our friends to the party.
Wir sollten alle unsere Freunde zur Party einladen.
C2 verb /ˈɪmprɛɡneɪt/

impregnate

durchtränken / schwängern
Meaning
To make pregnant; to fill or saturate with something.
Example
The scientist used a method to impregnate the material with resin.
Der Wissenschaftler verwendete eine Methode, um das Material mit Harz zu imprägnieren.
C1 verb /ˈɪnfɪltreɪt/

infiltrate

infiltrieren
Meaning
to secretly enter or gain access to a place or group
Example
The spies managed to infiltrate the enemy base.
Die Spione schafften es, die feindliche Basis zu infiltrieren.
C2 noun /ˌɪnkəˈpæsəti/

incapacity

Inkapazität
Meaning
the lack of ability, power, or fitness to do something
Example
His mental incapacity prevented him from making important decisions.
Seine geistige Inkapazität hinderte ihn daran, wichtige Entscheidungen zu treffen.
C1 noun /ˌɪndɪɡˈneɪʃən/

indignation

Empörung
Meaning
Strong displeasure or anger caused by something unjust, offensive, or insulting.
Example
Public indignation grew after the unfair verdict.
Öffentliche Empörung wuchs nach dem ungerechten Urteil.
C1 adjective /ˌɪndɪˈskrɪmɪnət/

indiscriminate

willkürlich
Meaning
Done without careful judgment; random or haphazard.
Example
The indiscriminate use of pesticides harms the environment.
Der willkürliche Einsatz von Pestiziden schadet der Umwelt.
C2 adverb /ˈɪntʃmiːl/

inchmeal

stückchenweise
Meaning
Gradually, little by little.
Example
The old castle fell inchmeal into ruin.
Das alte Schloss fiel stückchenweise in Ruinen.
B2 verb /ɪnˈhæbɪt/

inhabit

bewohnen
Meaning
to live in; to occupy as a dwelling
Example
Many animals inhabit the forest.
Viele Tiere bewohnen den Wald.
C2 adjective /ˌɪm.pəˈfɛk.tə.bəl/

imperfectible

unperfektibel
Meaning
Incapable of being made perfect or complete.
Example
Some human qualities are considered imperfectible.
Einige menschliche Eigenschaften gelten als unperfektibel.
C1 noun /ˌɪrɪˌspɒnsəˈbɪləti/

irresponsibility

Verantwortungslosigkeit
Meaning
lack of responsibility or accountability; failure to act in a reliable or sensible way
Example
The accident was caused by his irresponsibility at work.
Der Unfall wurde durch seine Verantwortungslosigkeit bei der Arbeit verursacht.
C1 adjective /ˌɪnækˈsɛsəbl/

inaccessible

unzugänglich
Meaning
unable to be reached, entered, or understood
Example
The remote village is almost inaccessible during the rainy season.
Das abgelegene Dorf ist während der Regenzeit fast unzugänglich.
C1 noun ˌɪn.tuˈɪʃ.ən

intuition

Intuition
Meaning
The ability to understand something immediately, without the need for conscious reasoning.
Example
Her intuition told her something was wrong.
Ihre Intuition sagte ihr, dass etwas nicht stimmte.
C2 adjective /ɪnˈɛksərəbl/

inexorable

unaufhaltsam
Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
Der unaufhaltsame Aufstieg der Technologie verändert jeden Aspekt des Lebens.
B1 adjective /ˈɪnəsənt/

Innocent

unschuldig; rein; harmlos
Meaning
free from guilt or sin; pure; harmless; naive
Example
The innocent child had no idea that her parents were planning a surprise party.
Das unschuldige Kind hatte keine Ahnung, dass ihre Eltern eine Überraschungsparty planten.
B1 noun /ɪnˌvɛs.tɪˈɡeɪ.ʃən/

investigation

untersuchung
Meaning
the process of inquiring into or examining something carefully to find the truth
Example
The investigation revealed new evidence about the fraud.
Die Untersuchung enthüllte neue Beweise für den Betrug.
C1 verb /ɪnˈkɑːrsəreɪt/

incarcerate

inhaftieren
Meaning
to imprison or confine someone
Example
The authorities incarcerated the criminal after the trial.
Die Behörden inhaftierten den Kriminellen nach dem Prozess.
C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

anorganisch
Meaning
relating to substances that are not derived from living organisms; lacking organic structure or growth
Example
Inorganic compounds are commonly studied in chemistry labs.
Anorganische Verbindungen sind wichtig in der Chemie.
B2 adjective /ˌɪd.iˈɒt.ɪk/

Idiotic

idiotisch
Meaning
extremely stupid; foolish; senseless
Example
His idiotic behavior embarrassed everyone at the meeting.
Sein idiotisches Verhalten hat alle bei der Besprechung in Verlegenheit gebracht.
C1 noun (plural) /ˈɪndɪˌsiːz/

indices

Indizes
Meaning
plural form of index; statistical measures or reference points used for comparison
Example
Stock market indices fell sharply after the announcement.
Die Indizes des Aktienmarkts fielen nach der Bekanntgabe stark.
C2 noun /ˈɪl.i.æd/

iliad

Ilias
Meaning
An ancient Greek epic poem attributed to Homer, describing the events of the Trojan War.
Example
Students studied the Iliad to understand Greek mythology and heroism.
Die Studenten studierten die Ilias, um die griechische Mythologie und den Heroismus zu verstehen.
C1 adjective /ˈaɪərnˌklæd/

ironclad

eiserne
Meaning
impossible to change, break, or dispute; very strong and firm
Example
The company had an ironclad contract with its suppliers.
Das Unternehmen hatte einen eisernen Vertrag mit seinen Lieferanten.
B1 noun ˌɪn.stɪˈtjuː.ʃən

institution

Institution
Meaning
An organization founded and united for a specific purpose; an established law, practice, or custom.
Example
Institutions play a crucial role in governance.
Institutionen spielen eine entscheidende Rolle in der Regierungsführung.
A1 adjective /ɪmˈpɔː.tənt/

important

wichtig
Meaning
Of great significance or value; likely to have a profound effect on success, survival, or well-being.
Example
Important steps must be taken to address pollution.
Wichtige Schritte müssen unternommen werden, um die Verschmutzung zu bekämpfen.
B2 adjective /ɪˈmætʃʊr/

Immature

unreif; nicht vollständig entwickelt; kindlich
Meaning
not fully developed; lacking emotional or intellectual development; childish
Example
His immature behavior during the meeting disappointed everyone.
Sein unreifes Verhalten während des Treffens enttäuschte alle.
B1 verb ɪnˈspaɪər

inspire

inspirieren
Meaning
To fill someone with the urge or ability to do or feel something, especially creative or noble.
Example
Artemis seeks to inspire future generations.
Artemis strebt danach, zukünftige Generationen zu inspirieren.
C1 adjective /ɪˈnɔːɡjərəl/

Inaugural

eröffnend
Meaning
marking the beginning of something; first; opening
Example
The president delivered his inaugural speech.
Der Präsident hielt seine Eröffnungsrede.
C2 noun /ɪˈreɪdiəns/

irradiance

Strahlung
Meaning
the quality of shining brightly; the intensity of light falling on a surface
Example
The irradiance of the sun at noon was overwhelming.
Die Strahlung der Sonne zur Mittagszeit war überwältigend.
C1 noun /ˈɪn.tə.mə.si/

Intimacy

Intimität; Nähe
Meaning
close familiarity or friendship; closeness; a private cozy atmosphere
Example
The couple valued the emotional intimacy they shared more than material possessions.
Das Paar schätzte die emotionale Intimität, die sie teilten, mehr als materiellen Besitz.
C2 noun /ɪˈnɪkwɪti/

iniquity

Ungerechtigkeit
Meaning
Immoral or grossly unfair behavior.
Example
The dictator's regime was marked by corruption and iniquity.
Das Regime des Diktators war von Korruption und Ungerechtigkeit geprägt.
C1 adjective ɪnˈsaɪ.sɪv

incisive

scharfsinnig
Meaning
Intelligently analytical and clear-thinking; showing clear thought and good understanding of what is important.
Example
His incisive comments revealed the core issues.
Seine scharfsinnigen Kommentare enthüllten die Kernprobleme.
C1 noun ɪnˈflɛk.ʃən

inflection

Intonation
Meaning
The change in pitch or tone of voice when speaking for emphasis.
Example
His inflection kept the audience engaged.
Seine Intonation hielt das Publikum gebannt.
C2 adjective /ɪmˌpɜːrˈsweɪdəbl/

impersuadable

unüberzeugbar
Meaning
not able to be convinced or persuaded
Example
She remained impersuadable despite all our arguments.
Sie blieb unüberzeugbar trotz all unserer Argumente.
C1 adjective /ˌɪnhɒˈspɪtəbl/

inhospitable

unwirtlich
Meaning
Harsh and difficult to live in; unfriendly or unwelcoming to guests.
Example
The desert is an inhospitable environment for most plants.
Die Wüste ist ein unwirtliches Umfeld für die meisten Pflanzen.
B2 noun /ˈɪnfənt/

infant

Säugling
Meaning
A very young child or baby.
Example
The infant was sleeping peacefully in the cradle.
Der Säugling schlief friedlich im Kinderbett.
C1 adjective /ɪnˈsɒlvənt/

insolvent

zahlungsunfähig
Meaning
unable to pay debts owed
Example
The insolvent firm could not meet its financial obligations.
Das zahlungsunfähige Unternehmen konnte seinen finanziellen Verpflichtungen nicht nachkommen.
A1 preposition /ˈɪntuː/

into

hinein
Meaning
expressing movement or direction to the inside of something
Example
She walked into the room quietly.
Sie ging leise in das Zimmer.
C2 noun /ˌɪnsjəˈlærəti/

insularity

Insularität
Meaning
The state of being isolated or narrow-minded.
Example
The insularity of the group prevented them from accepting new ideas.
Die Insularität der Gruppe verhinderte es, neue Ideen zu akzeptieren.
C1 noun ɪnˌten.sɪ.fɪˈkeɪ.ʃən

intensification

Intensivierung
Meaning
The process of becoming or making something more intense or extreme.
Example
The intensification of climate change requires urgent action.
Die Intensivierung des Klimawandels erfordert dringende Maßnahmen.
B2 adjective /ɪnˈkluːsɪv/

inclusive

inklusiv
Meaning
Including all the services, facilities, or items normally expected or required; not excluding any section of society or any party involved.
Example
Inclusive growth benefits all sections of society.
Inklusives Wachstum kommt allen gesellschaftlichen Bereichen zugute.
B1 verb /ɪnˈvɑːlv/

involve

einbeziehen
Meaning
to include as a necessary part, or to engage someone in an activity
Example
The project will involve several departments working together.
Das Projekt wird mehrere Abteilungen einbeziehen, die zusammenarbeiten.
B1 verb /ɪmˈpɔːrt/

import

importieren
Meaning
to bring goods or services into a country from abroad; to transfer data
Example
The country imports oil from abroad.
Das Land importiert Öl aus dem Ausland.
C2 verb /ˈɪmprɪkeɪt/

imprecate

verfluchen
Meaning
To utter a curse or invoke evil upon someone.
Example
The old woman imprecated her enemies with dark words.
Die alte Frau verfluchte ihre Feinde mit dunklen Worten.
C1 adjective /ˌɪnədˈvaɪzəbl/

inadvisable

nicht ratsam
Meaning
Not recommended; likely to have undesirable consequences.
Example
It is inadvisable to drive in such heavy rain.
Es ist nicht ratsam, bei solchem starken Regen zu fahren.
C1 noun /ˌɪn.trəˈspek.ʃən/

introspection

Introspektion
Meaning
The examination or observation of one's own mental and emotional processes; self-reflection.
Example
Through introspection, she gained insight into her emotions.
Durch Introspektion gewann sie tiefere Einblicke in ihre Emotionen.