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C1 adjective /ɪˈnɛpt/

inept

ungeschickt
Meaning
lacking skill or ability; clumsy or incompetent
Example
His inept handling of the situation made it worse.
Sein ungeschicktes Handling der Situation machte sie schlimmer.
C1 noun /ˌɪnkoʊˈhɪrəns/

incoherence

Inkohärenz
Meaning
The quality of being unclear, confused, or lacking logical connection.
Example
His speech was full of incoherence and difficult to follow.
Seine Rede war voller Inkohärenz und schwer zu folgen.
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

Unwahrscheinlichkeit
Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
Die Unwahrscheinlichkeit, zweimal die Lotterie zu gewinnen, hielt sie nicht davon ab, Tickets zu kaufen.
B2 verb /ɪnˈsʌlt/

insult

beleidigen
Meaning
to speak or act in a way that hurts someone's feelings or shows disrespect
Example
He felt insulted by her rude comments.
Er fühlte sich durch ihre unhöflichen Bemerkungen beleidigt.
B2 verb /ɪnˈflɪkt/

inflict

zufügen
Meaning
to cause something unpleasant or painful to be suffered by someone or something
Example
The storm inflicted considerable damage to the city.
Der Sturm fügte der Stadt erheblichen Schaden zu.
C2 verb /ɪnˈfætʃueɪt/

infatuate

verzücken
Meaning
to inspire with an intense but short-lived passion or admiration
Example
He was infatuated with her beauty.
Er war von ihrer Schönheit verzaubert.
B2 adjective + noun aɪˈdiːəl ɪnˈvaɪrənmənt

ideal environment

ideale Umgebung
Meaning
Perfect or most suitable conditions for growth or development
Example
Winter creates an ideal environment for vegetable growth.
Der Winter schafft eine ideale Umgebung für das Wachstum von Gemüse.
C1 noun /ˈɪd.i.əm/

idiom

Idiom
Meaning
A group of words whose meaning is different from the meanings of the individual words.
Example
The idiom 'break the ice' means to start a conversation in a friendly way.
Das Idiom 'Eis brechen' bedeutet, ein Gespräch auf freundliche Weise zu beginnen.
C2 noun /ˌɪmprɪˈmɑːtər/

imprimatur

Imprimatur
Meaning
An official license or approval, especially to publish a book.
Example
The book was released with the official imprimatur of the church.
Das Buch wurde mit dem offiziellen Imprimatur der Kirche veröffentlicht.
C1 noun /ˈɪnstɪˌɡeɪtər/

instigator

Anstifter
Meaning
A person who brings about or initiates something, usually something bad.
Example
The police identified him as the instigator of the violence.
Die Polizei identifizierte ihn als den Anstifter der Gewalt.
B2 noun /aɪˈdiː/

id

Ausweis
Meaning
identification; a document or number used to prove who someone is
Example
Please show your ID at the entrance.
Bitte zeigen Sie Ihren Ausweis am Eingang.
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.
C2 adjective /ˌɪn.trəˈsɛl.jʊ.lər/

intracellular

innerhalb der Zelle
Meaning
Located or occurring within a cell.
Example
The drug works by targeting intracellular bacteria.
Das Medikament wirkt, indem es intrazelluläre Bakterien anvisiert.
C1 adjective /ˌɪnɪkˈsplɪkəbl/

inexplicable

unverständlich
Meaning
Impossible to explain or understand.
Example
The sudden disappearance of the file was inexplicable.
Das plötzliche Verschwinden der Datei war unverständlich.
A2 verb /ɪmˈpruːv/

improve

verbessern
Meaning
to make or become better; to enhance quality or condition
Example
Practice helps improve your skills.
Übung hilft, Ihre Fähigkeiten zu verbessern.
B1 verb /ˌɪntəˈrʌpt/

interrupt

unterbrechen
Meaning
to stop someone from speaking or doing something by suddenly saying or doing something
Example
She tried not to interrupt while he was speaking.
Sie versuchte nicht zu unterbrechen, während er sprach.
C2 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

irreparabel
Meaning
Impossible to cure, repair, or remedy.
Example
The damage to the ancient manuscript was irremediable.
Der Schaden an dem alten Manuskript war irreparabel.
B2 adjective ˈaɪsəˌleɪtɪd

isolated

isoliert
Meaning
Alone or separated from others; having little or no contact with other people.
Example
Technological advancements often leave people isolated.
Technologische Fortschritte führen oft dazu, dass Menschen isoliert werden.
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.
C1 adjective /ˌɪrɪˈprɛsəbl̩/

irrepressible

unaufhaltsam
Meaning
Impossible to control or restrain.
Example
She had an irrepressible urge to laugh during the speech.
Sie konnte ihre unaufhaltsame Lust zu lachen während der Rede nicht verbergen.
C1 noun /ɪmˈprɪzənmənt/

imprisonment

Inhaftierung
Meaning
the act of putting someone in prison; the state of being confined as punishment
Example
He faced imprisonment for violating the court order.
Er musste wegen Missachtung der Gerichtsordnung mit Inhaftierung rechnen.
C1 adjective ˈɪn.lənd

Inland

Binnen
Meaning
Situated in the interior of a country; away from the coast.
Example
Inland transport boosts local trade.
Binnenverkehr fördert den lokalen Handel.
C2 adjective /ˌɪrɛvəˈrɛnʃəl/

irreverential

irreverent
Meaning
Showing a lack of respect for things that are generally taken seriously.
Example
His irreverential humor often shocked traditional audiences.
Sein irreverenter Humor schockierte oft traditionelle Zuschauer.
B2 noun /ɪnˈspɛktər/

inspector

inspektor
Meaning
An official employed to ensure regulations are obeyed or standards are met.
Example
The inspector carefully checked the restaurant's kitchen for hygiene standards.
Der Inspektor überprüfte sorgfältig die Küche des Restaurants auf Hygienestandards.
C2 adjective /ˌɪməˈmɔːriəl/

immemorial

unermesslich
Meaning
Extending back beyond memory or record; ancient.
Example
The tradition has been followed since time immemorial.
Die Tradition wird seit unermesslichen Zeiten befolgt.
C2 noun /ɪˈmɒdəsti/

immodesty

Unbescheidenheit
Meaning
lack of modesty or decency; behavior or attitude that is overly bold or improper
Example
The article was criticized for its tone of immodesty.
Der Artikel wurde wegen seines Tons der Unbescheidenheit kritisiert.
C1 adjective ɪnˈdʒiː.ni.əs

ingenious

genial
Meaning
Showing inventiveness and skill; clever, original, and inventive.
Example
His ingenious ideas transformed modern physics.
Seine genialen Ideen verwandelten die moderne Physik.
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.
C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

unentschuldbar
Meaning
Too bad to be justified or overlooked; unforgivable.
Example
His rude behavior was inexcusable.
Sein unhöfliches Verhalten war unentschuldbar.
A2 adjective, noun /ɪˈtæliən/

italian

Glück
Meaning
relating to Italy, its people, or its language; a person from Italy
Example
She loves Italian food.
Sie konnte ihr Glück nicht verbergen, als sie den Preis erhielt.
C1 noun ˌɪnˈsaɪtfʊlnɪs

insightfulness

Einsicht, Analysefähigkeit
Meaning
The capacity to gain an accurate and deep intuitive understanding of a person or thing.
Example
His insightfulness helped solve the complex problem.
Seine Einsicht half, das komplexe Problem zu lösen.
B1 adjective /ˌɪmpəˈlaɪt/

impolite

unhöflich
Meaning
Not showing good manners; rude.
Example
It is impolite to interrupt someone while they are speaking.
Es ist unhöflich, jemanden zu unterbrechen, während er spricht.
B1 noun ɪnˈven.ʃən

invention

Erfindung
Meaning
The action of inventing something, typically a process or device.
Example
The invention revolutionized communication.
Die Erfindung revolutionierte die Kommunikation.
C2 adjective /ɪnˈvʌlnərəbl/

invulnerable

unverwundbar
Meaning
Impossible to harm, damage, or defeat.
Example
The fortress was thought to be invulnerable to attack.
Die Festung galt als unverwundbar gegenüber Angriffen.
C1 adjective /ɪnˈflæməˌtɔːri/

inflammatory

Glück
Meaning
causing inflammation in the body; arousing anger, hostility, or strong emotion
Example
His inflammatory speech triggered protests across the city.
Sie konnte ihr Glück nicht verbergen, als sie den Preis erhielt.
C1 adjective /ɪnˈtɒl.ər.ə.bəl/

Intolerable

unerträglich
Meaning
unable to be endured; extremely unpleasant or painful
Example
The noise from the construction site was intolerable.
Der Lärm von der Baustelle war unerträglich.
C2 adjective /ˌɪrɪˈdjuːsəbl/

irreducible

unzerlegbar
Meaning
impossible to reduce or simplify further
Example
The fraction 3/7 is irreducible.
Der Bruch 3/7 ist unzerlegbar.
C2 noun /ɪnˈvɛktɪv/

invective

beleidigende Sprache
Meaning
Insulting, abusive, or highly critical language.
Example
The politician’s speech was filled with invective against his opponents.
Die Rede des Politikers war voller beleidigender Sprache gegen seine Gegner.
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.
B2 adjective /ˌɪn.trəˈdʌk.tər.i/

introductory

einführend
Meaning
Serving as an introduction; preliminary or preparatory.
Example
The professor gave an introductory lecture on economics.
Der Professor hielt einen einführenden Vortrag über Wirtschaft.
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.
C2 adjective /ɪmˈpræktɪkəbl/

impracticable

unpraktisch
Meaning
Not capable of being carried out or put into practice.
Example
The plan seemed impracticable due to limited resources.
Der Plan schien aufgrund begrenzter Ressourcen unpraktisch zu sein.
C2 noun /ɪnˈtɛmpərəns/

intemperance

Intemperanz
Meaning
Lack of moderation or self-control, especially with drinking or eating.
Example
His intemperance in drinking ruined his health.
Seine Intemperanz beim Trinken ruinierte seine Gesundheit.
B2 noun /ˈɪmɪɡrənt/

immigrant

Einwanderer
Meaning
a person who comes to live permanently in a foreign country
Example
The city has welcomed many new immigrants this year.
Die Stadt hat in diesem Jahr viele neue Einwanderer willkommen geheißen.
C1 adverb /ˌɪn.ədˈvɜːr.tənt.li/

Inadvertently

unbeabsichtigt; versehentlich; aus Versehen
Meaning
without being aware of what you are doing; unintentionally; by mistake
Example
She inadvertently deleted the important file while cleaning her computer.
Sie hat versehentlich die wichtige Datei gelöscht, während sie ihren Computer gereinigt hat.
A1 noun /ˌɪnfərˈmeɪʃən/

information

Information
Meaning
Facts or knowledge provided or learned about something.
Example
The website provides useful information about travel destinations.
Die Website bietet nützliche Informationen über Reiseziele.
C1 noun ɪnˌɛv.ɪ.təˈbɪl.ɪ.ti

inevitability

Unvermeidbarkeit
Meaning
The quality of being certain to happen and impossible to avoid or prevent.
Example
The inevitability of change is a part of life.
Die Unvermeidbarkeit des Wandels ist ein Teil des Lebens.
C1 adjective /ɪmˈpɜːmiəbl/

impermeable

undurchlässig
Meaning
Not allowing fluid or gas to pass through.
Example
The container is made of impermeable plastic.
Der Behälter besteht aus undurchlässigem Kunststoff.
B2 noun /ɪnˈtɛnsəti/

intensity

intensität
Meaning
The quality of being extreme, strong, or forceful in degree.
Example
The intensity of the storm frightened the villagers.
Die Intensität des Sturms erschreckte die Dorfbewohner.
C2 verb /ˌɪn.trəˈmɪt/

intromit

einführen
Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
Der Arzt führte das Instrument vorsichtig in die Wunde ein.
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 /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 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.
C2 noun /ɪˈnænɪti/

inanity

Unsinn, Dummheit
Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
Die Rede war voller Unsinn, der das Publikum langweilte.
A2 verb /ɪˈmædʒɪn/

imagine

vorstellen
Meaning
to form a mental image of; to believe something unreal to be true
Example
Can you imagine living in a different country?
Kannst du dir vorstellen, in einem anderen Land zu leben?
C1 verb /ˈɪmprəvaɪz/

improvise

improvisieren
Meaning
To create or perform something spontaneously without preparation.
Example
The actor had to improvise his lines when he forgot the script.
Der Schauspieler musste seine Zeilen improvisieren, als er das Skript vergessen hatte.
C1 noun /ɪnˈdaɪtmənt/

indictment

Anklageschrift
Meaning
a formal charge or accusation of a serious crime
Example
The indictment accused the company of multiple violations.
Die Anklageschrift beschuldigte das Unternehmen mehrfacher Verstöße.
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.
C2 noun /ˌɪmprəˈsɑːrioʊ/

impresario

Impresario
Meaning
A person who organizes or finances concerts, plays, or operas.
Example
The impresario arranged a series of concerts for the rising star.
Der Impresario organisierte eine Reihe von Konzerten für den aufstrebenden Star.
B1 noun ɪmˈpruːv.mənts

improvements

Verbesserungen
Meaning
The action of making or becoming better; an instance of something becoming or being made better.
Example
Continuous improvements increase productivity.
Kontinuierliche Verbesserungen steigern die Produktivität.
C2 adjective /ˈɪkθiɪk/

ichthyic

ichthyisch
Meaning
Relating to or resembling fish.
Example
The artist's painting had an ichthyic quality.
Das Gemälde des Künstlers hatte eine ichthyische Qualität.
C2 noun /ɪnˈfrækʃən/

infraction

Verstoß
Meaning
A violation or breach of a rule, law, or agreement.
Example
The student was punished for a minor infraction of the school rules.
Der Schüler wurde für einen kleinen Verstoß gegen die Schulregeln bestraft.
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 /ɪˈrɛvəkəbl/

irrevocable

unwiderruflich
Meaning
Not able to be revoked, changed, or undone.
Example
She made an irrevocable decision to leave the company.
Sie traf eine unwiderrufliche Entscheidung, das Unternehmen zu verlassen.
C1 adjective /ɪmˈpɛn.ɪ.trə.bəl/

impenetrable

Meaning
Impossible to pass through or enter; impossible to understand.
Example
The dense forest was nearly impenetrable.
B2 noun /ˈɪnstɪŋkt/

instinct

Instinkt
Meaning
A natural way of behaving or reacting that does not require learning.
Example
Birds build nests by instinct.
Vögel bauen ihre Nester aus Instinkt.
C1 noun /ɪnˈdɪf.ər.əns/

Indifference

indifferenz; gleichgültigkeit; apathie
Meaning
lack of interest, concern, or sympathy; the state of not caring about something
Example
His indifference to his studies resulted in poor grades throughout the semester.
Seine Indifferenz gegenüber seinen Studien führte zu schlechten Noten im gesamten Semester.
C1 adjective /ɪnˈflæməbəl/

Inflammable

entzündlich; brennbar
Meaning
easily set on fire; flammable; combustible
Example
The inflammable material caught fire quickly.
Das entzündliche Material brannte schnell.
C2 adjective /ɪnˈtræn.sɪ.dʒənt/

intransigent

unversöhnlich, stur, hartnäckig
Meaning
Unwilling or refusing to change one's views or to agree about something.
Example
His intransigent stance delayed the agreement.
Seine intransigente Haltung verzögerte die Vereinbarung.
C2 noun /ˌɪntərˈsɛʃən/

intercession

Fürbitte
Meaning
the act of intervening or pleading on behalf of another person
Example
The prisoner was released due to the intercession of influential leaders.
Der Gefangene wurde aufgrund der Fürbitte einflussreicher Führer freigelassen.
C2 noun /ɪnˈtɜːrmənt/

interment

Beerdigung
Meaning
The act of burying a dead body in a grave or tomb.
Example
The interment took place at the family cemetery.
Die Beerdigung fand auf dem Familienfriedhof statt.
B1 verb /ɪnˈfɔ:m/

inform

informieren
Meaning
to tell someone about something; to give information
Example
Please inform me when you arrive at the airport.
Bitte informieren Sie mich, wenn Sie am Flughafen ankommen.
C2 noun /ˌɪnkænˈteɪʃən/

incantation

Zauberspruch
Meaning
a series of words used as a magic spell or charm
Example
The wizard chanted an incantation to summon the spirits.
Der Zauberer sprach einen Zauberspruch, um die Geister zu beschwören.
C1 adjective /ˈɪmpətənt/

impotent

machtlos
Meaning
Lacking power, ability, or strength to take effective action.
Example
The citizens felt impotent against the corrupt system.
Die Bürger fühlten sich machtlos gegen das korrupte System.
C1 adjective ɪˈluː.sər.i

illusory

illusorisch
Meaning
Based on illusion; not real although seeming to be.
Example
His sense of security was entirely illusory.
Sein Gefühl der Sicherheit war völlig illusorisch.
C1 adjective /ˌɪn.səˈbɔːr.dɪ.nət/

insubordinate

aufsässig
Meaning
Defiant of authority; disobedient to orders.
Example
The insubordinate employee refused to follow the manager's instructions.
Der aufsässige Mitarbeiter weigerte sich, den Anweisungen des Managers zu folgen.
C1 noun /ɪnˈsaɪtmənt/

incitement

Anstiftung
Meaning
the action of provoking unlawful or violent behavior
Example
He was arrested for incitement to riot.
Er wurde wegen Anstiftung zur Gewalt verhaftet.
C2 adjective /ˈɪmənənt/

immanent

immanent
Meaning
existing or operating within; inherent
Example
He believed that moral values are immanent in human nature.
Er glaubte, dass moralische Werte in der menschlichen Natur immanent sind.
C1 adjective /ɪˈlɪsɪt/

illicit

illegal
Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
Die Polizei hat den illegalen Drogenhandel gestoppt.
C1 verb /ɪnˈtruːd/

intrude

einmischen
Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
Er fühlte sich peinlich berührt, in ihr privates Gespräch einzutreten.
C2 adjective /ˌɪnsəˈprɛsəbl/

insuppressible

unaufhaltsam
Meaning
That cannot be suppressed or restrained.
Example
She had an insuppressible urge to laugh during the ceremony.
Sie hatte einen unaufhaltsamen Drang zu lachen während der Zeremonie.
C1 noun /ɪmˌpɜː.sənˈeɪ.ʃən/

impersonation

Identitätsdiebstahl
Meaning
The action of pretending to be another person for the purpose of entertainment or fraud.
Example
Online impersonation is a serious cybercrime.
Online-Identitätsdiebstahl ist ein ernstes Cyberverbrechen.
B2 noun /ɪnˈfɪnɪti/

infinity

unendlich
Meaning
A concept describing something without any limit or end.
Example
The universe seems to stretch into infinity.
Das Universum scheint sich ins Unendliche auszudehnen.
B2 noun ɪnˌdʌstrɪəlaɪˈzeɪʃən

industrialization

Industrialisierung
Meaning
The development of industries in a country or region on a wide scale.
Example
Industrialization changed the global economy dramatically.
Die Industrialisierung hat die globale Wirtschaft dramatisch verändert.
A1 noun /ˈɪntənet/

internet

globales Computernetzwerk
Meaning
A global computer network providing a variety of information and communication facilities.
Example
The internet has revolutionized the way we access information.
Das Internet hat die Art und Weise revolutioniert, wie wir auf Informationen zugreifen.
C2 adjective /ɪˈnjʊərd/

inured

abgestumpft
Meaning
Accustomed to something, especially something unpleasant.
Example
After years of hardship, she was inured to suffering.
Nach Jahren des Leidens war sie an das Schmerzempfinden gewöhnt.
C2 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

Ichtiosaurier (eine Art ausgestorbener Meeresechse)
Meaning
Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.
Example
Ichthyosaurs were swift predators of the ancient seas.
Ichtiosaurier waren schnelle Raubtiere der alten Meere.
C2 verb /ˌɪmpɔːrˈtuːn/

importune

beständig bitten
Meaning
To ask someone persistently or pressingly for something
Example
The child importuned his mother for a new toy.
Das Kind beständigte seine Mutter um ein neues Spielzeug.
C2 adjective /ɪˈnɪkwɪtəs/

iniquitous

ungerechts
Meaning
grossly unfair and morally wrong
Example
Slavery was one of the most iniquitous practices in history.
Sklaverei war eine der ungerechtesten Praktiken in der Geschichte.
C2 verb /ˌɪmpɔːrˈtuːnd/

importuned

aufdringlich bitten
Meaning
asked someone persistently and pressingly for something
Example
She importuned her boss for a raise until he finally gave in.
Sie bat aufdringlich um eine Gehaltserhöhung bei ihrem Chef, bis er schließlich nachgab.
C2 noun /ˈɪŋkjʊbəs/

incubus

albtraumhafte Last
Meaning
An oppressive or nightmarish burden; in folklore, an evil spirit that lies upon sleeping people.
Example
Debt became an incubus that weighed heavily on the family.
Die Schulden wurden zu einer albtraumhaften Last, die schwer auf der Familie lastete.
C1 adjective /ɪˈmjuː.tə.bəl/

immutable

unveränderlich
Meaning
Unchangeable, permanent, or fixed
Example
The laws of physics are considered immutable.
Die Gesetze der Physik gelten als unveränderlich.
C2 adjective /ɪnˈdɛkərəs/

indecorous

indekorös
Meaning
Not in keeping with good taste and propriety; improper.
Example
His indecorous behavior shocked the audience.
Sein indekoröses Verhalten schockierte das Publikum.
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.
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

Der Prozess der Bildung und Entwicklung neuer Ideen oder Konzepte durch kreatives Denken und Brainstorming.
Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
Das Team nahm an Ideations-Sitzungen teil, um neue Produktideen zu entwickeln.
C2 noun /ɪˌluːmɪˈnɑːti/

illuminati

illuminati
Meaning
a group of people claiming to have special enlightenment or secret knowledge, often linked to conspiracies
Example
Many conspiracy theories involve the Illuminati as a secret world-controlling group.
Viele Verschwörungstheorien beinhalten die Illuminaten als eine geheime, weltbeherrschende Gruppe.
C2 noun /ˈaɪ.səˌbɑːr/

isobar

Isobar
Meaning
A line on a weather map connecting points of equal atmospheric pressure.
Example
The meteorologist explained how isobars indicate wind speed and direction.
Der Meteorologe erklärte, wie Isobaren die Windgeschwindigkeit und -richtung anzeigen.
B1 adjective /ɪmˈpruːvd/

improved

verbessert
Meaning
made better or enhanced in quality or condition
Example
Her health has significantly improved since last month.
Ihre Gesundheit hat sich seit letztem Monat erheblich verbessert.
B2 noun /ˈɪn.vɔɪs/

Invoice

Rechnung
Meaning
a list of goods sent or services provided, with a statement of the sum due for these
Example
The company sent an invoice for the office supplies delivered last week.
Das Unternehmen schickte eine Rechnung für die letzte Woche gelieferten Bürobedarf.
C2 adjective /ɪnˈkɒrɪdʒəbəl/

incorrigible

unverbesserlich
Meaning
incapable of being corrected, improved, or reformed
Example
He is an incorrigible optimist who never loses hope.
Er ist ein unverbesserlicher Optimist, der niemals die Hoffnung verliert.
B1 noun ɪˈnɪʃətɪv

initiative

Initiative
Meaning
An act or strategy intended to resolve a difficulty or improve a situation; a fresh approach to something.
Example
NASA's initiative to return humans to the Moon is ambitious.
Die Initiative der NASA, Menschen zum Mond zurückzubringen, ist ehrgeizig.
B2 adjective /ɪsˈlɑːmɪk/

islamic

islamisch
Meaning
relating to Islam, its followers, or its teachings
Example
The city has many Islamic cultural centers.
Die Stadt hat viele islamische Kulturzentren.
C2 verb /ˈɪndjʊˌreɪt/

indurate

verhärten
Meaning
To harden or make something physically or emotionally tough.
Example
Years of hardship indurated his spirit.
Jahre der Schwierigkeiten härteten seinen Geist.
B2 noun ɪnˈtɛɡrɪti

integrity

integrität
Meaning
The quality of being honest and having strong moral principles; moral uprightness.
Example
Teachers' integrity fosters a positive learning environment.
Die Integrität der Lehrer fördert ein positives Lernumfeld.
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.
C2 adjective /ɪnˈsɛnʃənt/

insentient

gefühllos
Meaning
Lacking perception, consciousness, or sensation.
Example
The rock is an insentient object with no awareness.
Der Felsen ist ein gefühlloses Objekt ohne Bewusstsein.
C1 adjective /ˌɪn.ɪˈfɛk.tʃu.əl/

ineffectual

ineffektiv
Meaning
Not producing any or the desired effect; lacking the ability or qualities to achieve a purpose.
Example
The manager’s ineffectual leadership caused the team to lose motivation.
Die ineffektive Führung des Managers führte dazu, dass das Team die Motivation verlor.
C1 adjective /ˌɪntərˈtʃeɪndʒəbl/

interchangeable

austauschbar
Meaning
able to be exchanged with each other without difference or loss of function
Example
These machine parts are interchangeable, so they can be replaced easily.
Diese Maschinenteile sind austauschbar, so dass sie einfach ersetzt werden können.
B2 verb /ˈɪl.ə.streɪt/

illustrate

veranschaulichen
Meaning
to explain or make something clear by using examples, pictures, or comparisons
Example
The teacher used diagrams to illustrate the concept.
Der Lehrer hat Diagramme verwendet, um das Konzept zu veranschaulichen.
C1 noun ˈɪn.fər.əns

inference

Schlussfolgerung
Meaning
A conclusion reached on the basis of evidence and reasoning; logical deduction.
Example
Scientists make inferences based on experimental data.
Wissenschaftler ziehen Schlussfolgerungen basierend auf experimentellen Daten.
C2 adjective /ˌɪntəˈrɒɡətəri/

interrogatory

interrogativ
Meaning
expressed in the form of a question; relating to questioning
Example
The lawyer’s interrogatory tone made the witness uncomfortable.
Der interrogative Ton des Anwalts machte den Zeugen unwohl.
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 adjective /ɪnˈhɪbɪtɪd/

inhibited

gehemmt
Meaning
Unable to act in a relaxed and natural way, especially due to self-consciousness or restraint.
Example
He was too inhibited to express his true feelings.
Er war zu gehemmt, um seine wahren Gefühle auszudrücken.
C1 verb /ɪnˈfɛst/

infest

befallen
Meaning
to overrun in large numbers, especially so as to cause damage or discomfort
Example
The old house was infested with rats.
Das alte Haus war von Ratten befallen.
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 /ˌɪrɪˈtriːvəbl/

irretrievable

unwiederbringlich
Meaning
impossible to recover or regain
Example
The documents were lost in an irretrievable way after the fire.
Die Dokumente wurden nach dem Brand auf unwiederbringliche Weise verloren.
C2 noun /ˌɪmbəˈsɪləti/

imbecility

Dummheit
Meaning
Extreme foolishness, stupidity, or weakness of mind.
Example
The plan was abandoned due to its sheer imbecility.
Der Plan wurde aufgrund seiner völligen Dummheit aufgegeben.
C1 adjective /ɪnˈsʌf.ər.ə.bəl/

insufferable

unerträglich
Meaning
Too extreme to bear; intolerable.
Example
The heat during the summer was insufferable.
Die Hitze im Sommer war unerträglich.
C1 adjective /ɪˈmuː.və.bəl/

immovable

unbeweglich
Meaning
Not able to be moved; fixed in position.
Example
Immovable barriers prevent change.
Unbewegliche Barrieren verhindern Veränderungen.
C1 adjective /ɪnˈdiːsənt/

indecent

unanständig
Meaning
not conforming to accepted standards of behavior or morality; improper or offensive
Example
He was warned for making an indecent remark during the meeting.
Er wurde wegen einer unanständigen Bemerkung verwarnt.
A2 adjective ˌɪn.təˈnæʃ.ən.əl

international

international
Meaning
Existing, occurring, or carried on between two or more nations and their citizens.
Example
International standards improve competitiveness.
Internationale Standards verbessern die Wettbewerbsfähigkeit.