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A2 adjective/noun /ˈaɪrɪʃ/

irish

Glück
Meaning
relating to Ireland, its people, or its language
Example
The Irish countryside is very beautiful.
Sie konnte ihr Glück nicht verbergen, als sie den Preis erhielt.
B2 adjective /ɪnˈtækt/

intact

intakt
Meaning
Remaining whole, complete, and undamaged.
Example
Despite the storm, the old house remained intact.
Trotz des Sturms blieb das alte Haus intakt.
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.
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.
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 /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.
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 adjective /ˌɪnkɔːrˈpɔːriəl/

incorporeal

inkorporell
Meaning
lacking a physical body; not composed of matter; intangible
Example
Ghosts are often described as incorporeal beings.
Gespenster werden oft als inkorporeelle Wesen beschrieben.
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.
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.
C2 adjective /ɪˈlɪmɪtəbl/

illimitable

unermesslich
Meaning
Without limits or bounds.
Example
The universe is often described as illimitable.
Das Universum wird oft als unermesslich beschrieben.
C2 verb /ɪnˈɡrɑːft/

ingraft

verankern
Meaning
To implant or fix deeply, often used in the sense of grafting an idea or quality.
Example
The teacher tried to ingraft good manners in the students.
Der Lehrer versuchte, gute Manieren bei den Schülern zu verankern.
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.
B2 verb ˈɪmplɪmentɪd

implemented

umgesetzt
Meaning
Put a decision or plan into effect; carried out or executed.
Example
The master plans were partially implemented.
Die Masterpläne wurden teilweise umgesetzt.
B2 adjective /ɪnˈklaɪnd/

inclined

geneigt
Meaning
having a tendency or disposition toward something
Example
He is inclined to help those in need.
Er ist geneigt, den Bedürftigen zu helfen.
C1 verb /ɪnˈstɪl/

instill

einflößen
Meaning
to gradually but firmly establish an idea, attitude, or habit in someone's mind
Example
Parents try to instill good values in their children.
Eltern versuchen, ihren Kindern gute Werte beizubringen.
C1 noun /ˌɪn.trəˈvɜːr.ʒən/

introversion

Introversion
Meaning
The tendency to be inward-looking and shy, preferring solitary activities.
Example
Her introversion made it difficult for her to enjoy large parties.
Ihre Introversion machte es ihr schwer, große Partys zu genießen.
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 adjective /ɪmˈpɛn.ɪ.tənt/

impenitent

unbußfertig
Meaning
Not feeling regret or shame about one's actions.
Example
The criminal remained impenitent after the trial.
Der Kriminelle blieb unbußfertig nach dem Prozess.
C1 adjective /ˈɪndɪɡoʊ bluː/

Indigo-blue

indigoblau
Meaning
a deep blue color with a purplish tinge
Example
The indigo-blue sky looked magnificent at twilight.
Der indigoblaue Himmel sah bei Dämmerung wunderschön aus.
C2 verb /ɪnˈdɛmnɪfaɪ/

indemnify

entschädigen
Meaning
to compensate someone for harm or loss; to secure against future damage or cost
Example
The insurance company agreed to indemnify the client for the damages.
Die Versicherungsgesellschaft stimmte zu, den Kunden für die Schäden zu entschädigen.
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 /ɪnˈdʒɛst/

ingest

einnehmen
Meaning
To take food, drink, or another substance into the body, usually by swallowing.
Example
The patient must ingest the medicine with water.
Der Patient muss das Medikament mit Wasser einnehmen.
B2 verb /ɪmˈpoʊzd/

imposed

auferlegt
Meaning
forced something to be accepted or put in place
Example
The government imposed new regulations on the industry.
Die Regierung hat neue Vorschriften für die Industrie erlassen.
C2 adjective /ɪˈmɒdərət/

immoderate

immoderat
Meaning
excessive; beyond reasonable limits
Example
He has an immoderate love for sweets.
Er hat eine immoderate Liebe zu Süßigkeiten.
C1 verb /ˈɪtəreɪt/

iterate

iterieren
Meaning
To repeat a process or statement, often to improve or refine.
Example
The software team will iterate the design until it meets user needs.
Das Softwareteam wird das Design iterieren, bis es den Benutzeranforderungen entspricht.
C2 adjective /ˌɪnfɪnɪˈtɛsɪməl/

infinitesimal

unmerklich
Meaning
Extremely small in size or amount; so tiny as to be almost negligible.
Example
The error was so infinitesimal that it didn’t affect the results.
Der Fehler war so unmerklich, dass er die Ergebnisse nicht beeinflusste.
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.
B1 verb /ɪnˈkriːst/

increased

erhöht
Meaning
became greater in size, amount, or degree
Example
The company's revenue increased last year.
Der Umsatz des Unternehmens ist im letzten Jahr gestiegen.
C1 noun /ɪmˈbæl.əns/

Imbalance

Ungleichgewicht
Meaning
lack of proportion or relation between corresponding things; unequal distribution
Example
The doctor said the patient's dizziness was caused by an inner ear imbalance.
Der Arzt sagte, dass die Schwindelgefühle des Patienten durch ein Ungleichgewicht im Innenohr verursacht wurden.
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.
C1 adjective /ɪmˈpɜːrsənl/

impersonal

unpersönlich
Meaning
not influenced by, showing, or involving personal feelings; lacking human warmth or emotion
Example
The letter was written in a very impersonal style.
Der Brief wurde in einem sehr unpersönlichen Stil geschrieben.
B2 noun /ɪsˈlɑːm/

islam

Islam Religion
Meaning
the religion founded by the Prophet Muhammad, based on belief in one God (Allah)
Example
Islam emphasizes peace, justice, and compassion.
Der Islam betont Frieden, Gerechtigkeit und Mitgefühl.
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 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.
B2 adjective /ˈɪnfɪnɪt/

infinite

unendlich
Meaning
limitless or endless in space, extent, or number
Example
The universe is often described as infinite.
Das Universum wird oft als unendlich beschrieben.
B1 noun /ɪnˈvɛstər/

investor

investor
Meaning
a person or organization that puts money into financial schemes, property, or business ventures with the expectation of achieving a profit
Example
The investor funded the startup with a large sum of money.
Der Investor finanzierte das Startup mit einer großen Geldsumme.
A1 noun /aɪˈdiː.ə/

Idea

Idee; Konzept; Vorschlag
Meaning
a thought or suggestion as to a possible course of action; a concept or mental impression
Example
She had a brilliant idea for solving the company's efficiency problem.
Sie hatte eine brillante Idee zur Lösung des Effizienzproblems des Unternehmens.
B2 noun /ɪnˈdʒɛkʃən/

injection

Injektion
Meaning
the act of introducing a substance into the body through a needle
Example
The nurse gave me an injection to prevent the infection.
Die Krankenschwester gab mir eine Injektion, um die Infektion zu verhindern.
B1 noun /ˈɪnstrəmənt/

instrument

Instrument
Meaning
A tool or device used for a particular purpose, especially for scientific or musical work.
Example
The doctor used a special instrument during the surgery.
Der Arzt benutzte ein spezielles Instrument während der Operation.
C1 noun /ɪnˈsæn.ə.ti/

Insanity

Wahnsinn; Geisteskrankheit
Meaning
the state of being seriously mentally ill; extreme foolishness or irrationality
Example
The defense lawyer argued that his client was not guilty by reason of insanity.
Der Verteidiger argumentierte, dass sein Mandant aufgrund von Wahnsinn nicht schuldig sei.
B2 noun /ˌɪn.dɪˈkeɪ.ʃən/

Indication

Indikation; Zeichen
Meaning
a sign or piece of information that indicates something; a suggestion or hint
Example
The dark clouds were a clear indication that a storm was approaching the area.
Die dunklen Wolken waren ein deutliches Zeichen dafür, dass ein Sturm sich der Gegend näherte.
A2 adjective /ɪmˈpɑːsəbl/

impossible

unmöglich
Meaning
not able to occur, exist, or be done
Example
It is impossible to finish this work in one day.
Es ist unmöglich, diese Arbeit an einem Tag zu beenden.
A2 noun/adjective /ˌɪndɪˈvɪdʒuəl/

individual

Individuum
Meaning
A single human being as distinct from a group; relating to one person.
Example
Each individual has the right to freedom of speech.
Jeder Einzelne hat das Recht auf freie Meinungsäußerung.
C1 adjective ɪn ˈfleɪ.ʃə.ner.i

inflationary

inflationär
Meaning
Characterized by or tending to cause monetary inflation; relating to rising prices.
Example
The government took measures to control inflationary pressures.
Die Regierung ergriff Maßnahmen zur Kontrolle der inflationären Drücke.
B2 verb /ɪmˈpoʊz/

impose

auferlegen
Meaning
to force someone to accept something; to establish or apply by authority
Example
The government imposed new taxes on luxury goods.
Die Regierung hat neue Steuern auf Luxusgüter auferlegt.
C2 verb /ɪnˈɡreɪʃiˌeɪt/

ingratiate

Meaning
To gain favor or approval by deliberate effort, often in a flattering way.
Example
She tried to ingratiate herself with her boss by complimenting him often.
C1 noun /ɪnˈfjuːʒən/

infusion

Infusion
Meaning
the act of introducing something into another; a drink made by steeping leaves or herbs in liquid
Example
She prepared a calming infusion of chamomile tea.
Sie bereitete eine beruhigende Infusion aus Kamillentee zu.
C1 verb /ˌɪnstɪˈtjuːʃənəlaɪz/

institutionalize

institutionalisieren
Meaning
to establish something as a formal institution, custom, or practice
Example
The government seeks to institutionalize environmental protection.
Die Regierung strebt danach, den Umweltschutz zu institutionalisieren.
B2 adjective /ɪmˈplɪsɪt/

implicit

implizit
Meaning
Suggested or understood without being directly stated.
Example
Her trust in him was implicit.
Ihr Vertrauen in ihn war implizit.
B2 noun /ˌaɪ.səˈleɪ.ʃən/

Isolation

Isolation
Meaning
the process or fact of isolating or being isolated; separation from other people or things
Example
The patient was kept in isolation to prevent the spread of the infectious disease.
Der Patient wurde in Isolation gehalten, um die Ausbreitung der ansteckenden Krankheit zu verhindern.
C1 adjective /ɪnˈedəbəl/

Inedible

ungenießbar
Meaning
not suitable or safe for eating; not edible
Example
The mushrooms were poisonous and completely inedible.
Die Pilze waren giftig und völlig ungenießbar.
C2 adjective /ɪˈmɪsəbl/

immiscible

unlöslich
Meaning
Describes liquids that do not mix together.
Example
Oil and water are immiscible liquids.
Öl und Wasser sind unlösliche Flüssigkeiten.
C2 verb /aɪˈtɪnəˌreɪt/

itinerate

reisen
Meaning
To travel from place to place, usually for the purpose of work or preaching.
Example
The missionary itinerated throughout the region to spread the message.
Der Missionar reiste durch die Region, um die Botschaft zu verbreiten.
B2 verb /ɪtʃ/

itch

Juckreiz
Meaning
to feel an urge to scratch; to have a restless desire
Example
My skin itches from the mosquito bites.
Meine Haut juckt wegen der Mückenstiche.
B1 verb /ɪnˈvɛnt/

invent

erfinden
Meaning
to create or design something that has not existed before
Example
Thomas Edison invented the electric bulb.
Thomas Edison erfand die elektrische Glühbirne.
B2 verb /ˈɪmɪteɪt/

imitate

imitieren
Meaning
to copy the behavior or manner of someone or something
Example
Children often imitate their parents' behavior.
Kinder ahmen oft das Verhalten ihrer Eltern nach.
C1 noun ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

Indigene Traditionen
Meaning
Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.
Example
Indigenous traditions in the Chittagong Hill Tracts are unique.
Die indigenen Traditionen in den Chittagong Hill Tracts sind einzigartig.
C2 noun /ɪmˈpjuːnɪti/

impunity

Immunität
Meaning
freedom from punishment or harmful consequences for an action
Example
The dictator ruled with impunity, ignoring international laws.
Der Diktator regierte mit Impunität und ignorierte internationale Gesetze.
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 /ˌɪnflɛksɪˈbɪlɪti/

inflexibility

Unflexibilität
Meaning
the quality of being rigid or unwilling to change; lack of adaptability
Example
The inflexibility of the rules caused unnecessary delays.
Die Unflexibilität der Regeln verursachte unnötige Verzögerungen.
C1 verb /ɪnˈvoʊk/

invoke

anrufen
Meaning
to call upon a higher power, authority, or principle for help, support, or justification
Example
The lawyer invoked the constitution to defend his client.
Der Anwalt rief die Verfassung an, um seinen Mandanten zu verteidigen.
B1 adjective /ɪnkəˈrɛkt/

incorrect

falsch
Meaning
not correct or accurate
Example
The information you provided was incorrect.
Die Informationen, die du gegeben hast, waren falsch.
C2 adjective ˌɪm.pəˈtɜː.bə.bəl

imperturbable

unerschütterlich
Meaning
Unable to be upset or excited; not easily disturbed.
Example
His imperturbable nature made him a great leader.
Seine unerschütterliche Natur machte ihn zu einem großartigen Führer.
A2 verb /ˌɪntrəˈduːs/

introduce

vorstellen
Meaning
to present someone; to bring in for the first time
Example
Let me introduce you to my friend.
Lass mich dir meinen Freund vorstellen.
C1 adjective /ɪˈnɒkjuəs/

innocuous

harmlos
Meaning
Not harmful or offensive.
Example
His remark was completely innocuous and not meant to offend anyone.
Seine Bemerkung war völlig harmlos und nicht dazu gedacht, jemanden zu beleidigen.
C1 verb /ɪnˈterəˌɡeɪt/

interrogate

verhören
Meaning
to ask someone questions in a thorough and formal way; to question intensively
Example
The police interrogated the suspect for hours.
Die Polizei hat den Verdächtigen stundenlang verhört.
C1 adjective /ɪmˈpɜːrviəs/

impervious

undurchlässig
Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
Die Jacke ist undurchlässig gegen Regen.
C1 adjective /ɪnˈtɜːrmənəbl/

interminable

unendlich
Meaning
Seemingly endless; having no apparent end.
Example
The meeting felt interminable and exhausting.
Das Treffen schien unendlich und ermüdend.
C2 adjective /ˈɪndələnt/

indolent

träge
Meaning
Wanting to avoid activity or exertion; lazy.
Example
The indolent cat slept in the sun all afternoon.
Die träge Katze schlief den ganzen Nachmittag in der Sonne.
B2 noun /ˌɪnəˈbɪləti/

inability

unfähigkeit
Meaning
the state of being unable to do something
Example
His inability to make decisions affected his career.
Seine Unfähigkeit, Entscheidungen zu treffen, beeinträchtigte seine Karriere.
C1 noun /ɪnˈɛk.wɪ.ti/

inequity

Ungerechtigkeit
Meaning
Lack of fairness or justice; unequal distribution or treatment.
Example
Social inequity continues to be a global issue.
Soziale Ungerechtigkeit bleibt ein globales Problem.
B2 noun ɪˈlɪtərəsi

illiteracy

Illiteralismus
Meaning
The inability to read and write; lack of education or knowledge in a particular area.
Example
Illiteracy often leads to poverty and unemployment.
Illiteralismus führt oft zu Armut und Arbeitslosigkeit.
B1 noun /ɪmˈprɛʃən/

impression

Eindruck, Konzept
Meaning
an idea, feeling, or opinion about something or someone
Example
The book gave me a good first impression.
Das Buch hinterließ bei mir einen guten ersten Eindruck.
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.
C2 noun /ˌɪmpjuˈteɪʃən/

imputation

Imputation
Meaning
an accusation or attribution of blame
Example
The politician denied the imputation of corruption.
Der Politiker bestritt die Imputation der Korruption.
B2 noun ˈɪn.deks

index

Index
Meaning
An alphabetical list of names, subjects, etc. with references to the places where they occur, typically found at the end of a book; a sign or measure of something.
Example
An index organizes critical data.
Ein Index organisiert wichtige Daten.
B1 adjective ˌɪn.dɪˈpen.dənt

independent

unabhängig
Meaning
Not depending on another for livelihood or subsistence; free from outside control; not subject to another's authority.
Example
An independent institution ensures transparency in governance.
Eine unabhängige Institution sorgt für Transparenz in der Regierungsführung.
C2 noun /ɪmˌpɜːrtərbəˈbɪləti/

imperturbability

Unerschütterlichkeit
Meaning
The quality of being calm and not easily disturbed or upset.
Example
Her imperturbability during the crisis impressed everyone.
Ihre Unerschütterlichkeit während der Krise beeindruckte alle.
B2 adjective /ˌɪnɪˈfɪʃənt/

Inefficient

ineffizient
Meaning
not achieving maximum productivity; wasteful of time or resources
Example
The old computer system was inefficient and wasted a lot of time.
Das alte Computersystem war ineffizient und verschwendete viel Zeit.
B1 noun ɪnˈvestmənt

investment

Investition
Meaning
The action or process of investing money for profit or material result.
Example
Investment in waste management infrastructure is essential.
Investitionen in Abfallmanagementinfrastruktur sind unerlässlich.
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.
C1 noun ˌɪn.ɪˈfɪʃ.ən.si

inefficiency

Ineffizienz
Meaning
The state or quality of not achieving maximum productivity; failure to make the best use of time or resources.
Example
Government inefficiency leads to slow project completion.
Regierungsineffizienz führt zu langsamer Projektfertigstellung.
C1 adjective /ˌɪnkɒmprɪˈhɛnsəbl/

incomprehensible

unverständlich
Meaning
Impossible or very difficult to understand.
Example
The professor’s lecture was so fast it became incomprehensible.
Die Vorlesung des Professors war so schnell, dass sie unverständlich wurde.
C2 noun /ɪnˈtræn.sɪ.dʒəns/

intransigence

Unnachgiebigkeit
Meaning
Refusal to change one's views or to agree about something.
Example
The negotiations failed due to the intransigence of both parties.
Die Verhandlungen scheiterten aufgrund der Unnachgiebigkeit beider Parteien.
C1 adjective /ɪnˈfɜːm/

infirm

schwach
Meaning
Weak, especially due to old age or illness.
Example
The infirm old man needed assistance to walk.
Der schwache alte Mann brauchte Hilfe, um zu gehen.
C1 adjective /ˌɪnəˈtɛntɪv/

inattentive

unaufmerksam
Meaning
not paying attention; lacking focus or concentration
Example
The inattentive student missed several important instructions.
Der unaufmerksame Schüler verpasste mehrere wichtige Anweisungen.
C1 adjective ɪnɪɡˈzɔːstɪbəl

inexhaustible

unerschöpflich
Meaning
Unable to be used up or worn out; limitless.
Example
His inexhaustible energy allowed him to work tirelessly on his projects.
Seine unerschöpfliche Energie ermöglichte es ihm, unermüdlich an seinen Projekten zu arbeiten.
B2 verb /ɪnˈdjuːs/

induce

induzieren
Meaning
to cause or persuade someone to do something; to bring about a result
Example
The doctor induced sleep with a mild sedative.
Der Arzt induzierte den Schlaf mit einem leichten Beruhigungsmittel.
C1 noun /ɪmˈpɛd.ɪ.mənt/

impediment

Hindernis
Meaning
A hindrance or obstruction in doing something; something that prevents progress.
Example
Lack of funds is a major impediment to the project.
Der Mangel an Mitteln ist ein großes Hindernis für das Projekt.
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.
C2 noun /ˌɪnvəˈlɪdɪti/

invalidity

Ungültigkeit
Meaning
the state of being invalid, legally void, or lacking force or validity
Example
The court ruled that the contract suffered from invalidity.
Das Gericht entschied, dass der Vertrag ungültig war.
C1 adjective /ˌɪn.səbˈstæn.ʃəl/

insubstantial

unwesentlich
Meaning
Lacking strength, substance, or solidity.
Example
The evidence provided was insubstantial and unconvincing.
Die bereitgestellten Beweise waren unwesentlich und wenig überzeugend.
C1 verb ɪˈnɔː.ɡjə.reɪ.tɪd

inaugurated

eingeweiht
Meaning
Begin or introduce (a system, policy, or period) formally.
Example
The organization was inaugurated officially.
Die Organisation wurde offiziell eingeweiht.
C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

Unregelmäßigkeit
Meaning
lack of regularity or consistency; a deviation from what is normal, expected, or orderly
Example
The audit revealed several financial irregularities in the company’s records.
Die Prüfung deckte mehrere finanzielle Unregelmäßigkeiten in den Unterlagen des Unternehmens auf.
B2 noun /ɪmˈpeɪʃəns/

impatience

Ungeduld
Meaning
The state of being quickly irritated or unable to wait calmly.
Example
His impatience grew as the meeting dragged on.
Seine Ungeduld wuchs, als sich das Treffen in die Länge zog.
C2 noun /ˌɪn.ɪˈbraɪ.ə.ti/

inebriety

Trunkenheit
Meaning
the state of being drunk or intoxicated
Example
His frequent inebriety led to the loss of his job.
Seine häufige Trunkenheit führte zum Verlust seiner Arbeit.
C2 conjunction /ˌɪnəzˈmʌtʃ æz/

inasmuch-as

da
Meaning
Because; since.
Example
He cannot attend, inasmuch as he is unwell.
Er kann nicht teilnehmen, da er krank ist.
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.
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.
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.
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 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.
B2 noun /ɪnˈkluːʒən/

inclusion

Inklusion
Meaning
the action or state of including or being included within a group or structure
Example
Diversity and inclusion are key values in modern workplaces.
Vielfalt und Inklusion sind wichtige Werte in modernen Arbeitsplätzen.
C2 adjective /ˌɪnˈekspɜːrt/

inexpert

unerfahren
Meaning
not skilled or experienced; lacking expertise
Example
The inexpert handling of the machine caused several mistakes.
Die unerfahrene Bedienung der Maschine verursachte mehrere Fehler.
C2 verb /ɪˈreɪdieɪt/

irradiate

irradieren
Meaning
to shine light on something; to expose to radiation; to illuminate or brighten
Example
The scientist used a lamp to irradiate the sample.
Der Wissenschaftler verwendete eine Lampe, um die Probe zu irradieren.
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.
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.
C1 verb /ɪɡˈnaɪt/

ignite

entzünden
Meaning
To catch fire or cause to catch fire; to start or arouse.
Example
The sparks ignited the dry leaves in seconds.
Die Funken entzündeten die trockenen Blätter in Sekunden.
C1 adjective ɪnˈkʌm.bənt

incumbent

verpflichtend
Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
Es ist für alle Bürger verpflichtend, das Gesetz zu befolgen.
C1 noun /ɪnˈfɜːrnoʊ/

inferno

Brand
Meaning
a large, intense fire that is dangerously out of control
Example
The building turned into an inferno within minutes.
Das Gebäude verwandelte sich in ein Inferno innerhalb von Minuten.
C2 noun /ˈɪd.i.ə.si/

Idiocy

Idiotie
Meaning
extremely stupid behavior or actions; foolishness
Example
The decision to ignore safety protocols was pure idiocy that endangered everyone.
Die Entscheidung, die Sicherheitsprotokolle zu ignorieren, war pure Idiotie, die alle in Gefahr brachte.
A1 pronoun /ɪts/

its

sein
Meaning
Belonging to or associated with a thing previously mentioned.
Example
The company changed its logo last year.
Das Unternehmen hat letztes Jahr sein Logo geändert.
C1 noun ˌɪnfrəˈstrʌktʃərəl dɪˈveləpmənt

infrastructural development

infrastrukturelle Entwicklung
Meaning
The process of building and improving the basic physical and organizational structures and facilities needed for the operation of a society or enterprise.
Example
Infrastructural development is necessary for efficient recycling.
Infrastrukturelle Entwicklung ist notwendig für effizientes Recycling.
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 adjective /ɪnˈvɑːlənˌtɛri/

involuntary

unfreiwillig
Meaning
done without will or conscious control
Example
He gave an involuntary shiver when he heard the loud noise.
Er bekam einen unwillkürlichen Schauer, als er das laute Geräusch hörte.
B2 adjective /ˌɪnəˈproʊpriət/

inappropriate

unangemessen
Meaning
not suitable or proper in the circumstances
Example
It was inappropriate to talk loudly in the library.
Es war unangemessen, in der Bibliothek laut zu sprechen.
C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

ideologisch
Meaning
Relating to or based on a system of ideas or beliefs.
Example
The two parties are divided by deep ideological differences.
Die beiden Parteien sind durch tiefgehende ideologische Unterschiede geteilt.
C2 adjective /ˈɪm.pi.əs/

Impious

gotteslästerlich; ungläubig
Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
Die gotteslästerliche Handlung schockierte die religiöse Gemeinschaft.
C2 adjective /ˌɪnkoʊˈɜːrsəbl̩/

incoercible

unbezwingbar
Meaning
Not capable of being forced, compelled, or restrained.
Example
Her incoercible spirit inspired others to fight for justice.
Ihr unbezwingbarer Geist inspirierte andere, für Gerechtigkeit zu kämpfen.
B1 abbreviation /ˌaɪˈiː/

ie

d.h.
Meaning
That is to say; used to clarify or explain something more precisely.
Example
Many amphibians, i.e., frogs and salamanders, can live both in water and on land.
Viele Amphibien, d.h. Frösche und Salamander, können sowohl im Wasser als auch an Land leben.