officer
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B1 noun /ˈɔːfɪsər/

officer

Beamter
Meaning
a person in a position of authority, especially in law enforcement
Example
The officer gave him a ticket for speeding.
Der Beamte gab ihm ein Ticket wegen zu schnellen Fahrens.
C1 noun /ˈəʊ.nəs/

onus

Verantwortung
Meaning
A duty or responsibility, especially a heavy one.
Example
The onus is on the government to provide relief to the victims.
Die Verantwortung liegt bei der Regierung, den Opfern Hilfe zu leisten.
B2 adverb /ˈəʊvəli/

overly

übermäßig
Meaning
to an excessive degree or extent
Example
She was overly concerned about the results.
Sie war übermäßig besorgt über die Ergebnisse.
C1 noun /ɒpˈtɒmɪtrɪst/

optometrist

Optometrist
Meaning
A healthcare professional who examines eyes and prescribes corrective lenses.
Example
The optometrist prescribed new glasses for her.
Der Optometrist verschrieb ihr neue Brillen.
B1 noun /ˈɑː.lɪv/

Olive

Olive
Meaning
a small oval fruit with a hard pit, typically green or black, used for eating or making oil
Example
Olive oil is considered one of the healthiest cooking oils available.
Olivenöl gilt als eines der gesündesten Kochöle, die verfügbar sind.
A2 adverb /ˈɒbviəsli/

obviously

offensichtlich
Meaning
in a way that is easily perceived or understood; clearly
Example
Obviously, he didn’t read the instructions.
Offensichtlich hat er die Anweisungen nicht gelesen.
C2 adjective /ˈoʊ.pən ˈhæn.dɪd/

Open-handed

großzügig; liberal
Meaning
Generous; liberal; giving freely;
Example
He is very open-handed with his money and always helps those in need.
Er ist sehr großzügig mit seinem Geld und hilft immer den Bedürftigen.
C2 noun /oʊliˈændər/

Oleander

oleander
Meaning
a poisonous evergreen shrub with clusters of white, pink, or red flowers
Example
The beautiful oleander flowers bloomed in the garden despite their toxic nature.
Die schönen Oleanderblumen blühten im Garten, trotz ihrer giftigen Natur.
C2 noun /ˌɒktədʒəˈnɛəriən/

octogenarian

Oktogenarier
Meaning
A person who is between 80 and 89 years old.
Example
The octogenarian still jogs every morning to stay healthy.
Der Oktogenarier joggt immer noch jeden Morgen, um gesund zu bleiben.
B1 noun /əˈkeɪ.ʒən/

Occasion

Gelegenheit; besonderer Anlass
Meaning
a particular time or instance of an event; a special celebration
Example
Their wedding was a joyous occasion.
Ihre Hochzeit war eine freudige Gelegenheit.
C1 noun /əbˈzɜːvəns/

observance

Beachtung
Meaning
The practice of following a custom, rule, or religious law.
Example
The festival is held in observance of a centuries-old tradition.
Das Festival wird zur Beachtung einer jahrhundertealten Tradition abgehalten.
B2 verb /ˌoʊvərˈsiː/

oversee

überwachen
Meaning
to supervise or watch over something; to manage and direct
Example
The manager will oversee the entire construction project.
Der Manager wird das gesamte Bauprojekt überwachen.
B2 noun /ˌaʊtˈsaɪdə(r)/

outsider

Außenseiter
Meaning
a person who is not accepted as a member of a particular group or community
Example
As a new student, she often felt like an outsider at school.
Als neue Studentin fühlte sie sich oft wie eine Außenseiterin in der Schule.
C2 noun /ˌɒn.əˌmæt.əˈpiː.ə/

onomatopoeia

Onomatopöie
Meaning
The formation of a word from a sound associated with what is named.
Example
The word 'buzz' is an example of onomatopoeia.
Das Wort 'Summen' ist ein Beispiel für Onomatopöie.
A1 preposition /ʌv/

of

von
Meaning
expressing the relationship between a part and a whole
Example
The book is on the table, in front of the window.
Das Buch ist auf dem Tisch, vor dem Fenster.
A2 adjective /ɒd/

Odd

seltsam; ungewöhnlich; anders als das, was normal oder erwartet wird
Meaning
strange; unusual; different from what is normal or expected
Example
That's an odd way to solve the problem.
Das ist eine seltsame Art, das Problem zu lösen.
B2 noun /oʊˈbiː.di.əns/

Obedience

gehorsam
Meaning
compliance with an order, request, or law; submission to authority
Example
Children should show obedience to their parents.
Kinder sollten ihren Eltern Gehorsam zeigen.
A1 pronoun /aʊərz/

ours

unser
Meaning
belonging to or associated with us
Example
This victory is ours.
Dieser Sieg gehört uns.
C1 noun /ˈɑd.ɪ.ti/

Oddity

Seltenheit
Meaning
something that is strange or unusual; a peculiar trait
Example
His habit of sleeping standing up was considered an oddity.
Seine Gewohnheit, im Stehen zu schlafen, wurde als eine Seltenheit betrachtet.
B2 noun /ˈɔːkɪstrə/

orchestra

Orchester
Meaning
a large group of musicians playing different instruments together
Example
The orchestra performed beautifully at the concert.
Das Orchester hat beim Konzert wunderschön gespielt.
C1 verb ˈɔːr.kɪ.streɪt

orchestrate

koordiniert
Meaning
To plan or coordinate the elements of (a situation) to produce a desired effect, especially surreptitiously.
Example
He skillfully orchestrated the entire event.
Er hat das gesamte Event geschickt orchestriert.
C2 noun /ˈɒkjʊlɪst/

oculist

Augenarzt
Meaning
An old-fashioned term for an eye doctor or ophthalmologist.
Example
The village oculist was known for treating various eye diseases.
Der Oculist des Dorfes war bekannt für die Behandlung verschiedener Augenkrankheiten.
C1 noun /ˈoʊ.vər spɪl/

Over-spill

Überlauf
Meaning
the overflow of liquid from a container; excess that cannot be contained
Example
The overspill from the river flooded nearby farms.
Der Überlauf des Flusses überflutete nahegelegene Farmen.
B2 noun /ˈɒp.tɪ.mɪ.zəm/

optimism

Optimismus
Meaning
Hopefulness and confidence about the future or the successful outcome of something.
Example
Her optimism helped her overcome difficult times.
Ihr Optimismus half ihr, schwierige Zeiten zu überstehen.
C1 verb /ˌoʊvərˈpaʊər/

overpower

überwältigen
Meaning
To defeat or gain control over someone or something by using greater strength or force.
Example
The soldiers managed to overpower the enemy forces.
Die Soldaten konnten die feindlichen Truppen überwältigen.
B1 noun /ˌɑk.jəˈpeɪ.ʃən/

Occupation

Beruf; Beschäftigung; Übernahme
Meaning
a job or profession; the action of taking control of a place
Example
Teaching is her chosen occupation.
Lehren ist ihr gewählter Beruf.
B2 noun /əbˈzɜːvər/

observer

Beobachter
Meaning
a person who watches or notices something
Example
The observer took notes during the meeting.
Der Beobachter machte während des Treffens Notizen.
B2 noun /ˈɑp.tə.mɪst/

Optimist

Optimist
Meaning
a person who tends to be hopeful and confident about the future; someone who sees the good side of things
Example
As an optimist, she always believed things would improve.
Als Optimist glaubte sie immer, dass sich die Dinge verbessern würden.
C2 noun /oʊˈbleɪʃən/

oblation

Opfergabe
Meaning
a religious offering, especially of bread or wine to God
Example
The priest placed the oblation on the altar during the ceremony.
Der Priester legte die Opfergabe während der Zeremonie auf den Altar.
C1 noun ˈoʊʃən əˌsɪdɪfɪˈkeɪʃən

ocean acidification

Ozeanversauerung
Meaning
The ongoing decrease in the pH of the Earth's oceans, caused by the absorption of carbon dioxide from the atmosphere.
Example
Ocean acidification is caused by atmospheric CO2 absorption.
Ozeanversauerung wird durch die Aufnahme von CO2 aus der Atmosphäre verursacht.
C1 verb /uːz/

ooze

sickern
Meaning
to slowly flow or leak out through small openings or pores
Example
Blood began to ooze from the small cut.
Blut begann aus dem kleinen Schnitt zu sickern.
B2 noun ˈɔː.bɪt

orbit

Umlaufbahn
Meaning
The curved path of a celestial object around a star, planet, or moon.
Example
The satellite maintains its orbit around Earth.
Der Satellit hält seine Umlaufbahn um die Erde bei.
C1 verb /aʊtˈwɪt/

outwit

überlisten
Meaning
to defeat or gain an advantage over someone by being more clever or cunning
Example
The fox managed to outwit the hunters.
Der Fuchs konnte die Jäger überlisten.
C1 noun /ˈɑn.set/

Onset

Beginn; Auftakt
Meaning
the beginning or early stages of something; the start of a medical condition
Example
The onset of winter brought heavy snowfall.
Der Beginn des Winters brachte starken Schneefall.
B1 adjective /əˈkeɪ.ʒən.əl/

Occasional

gelegentlich
Meaning
occurring infrequently or irregularly; happening from time to time
Example
She enjoys occasional walks in the park.
Sie genießt gelegentliche Spaziergänge im Park.
C1 noun /ˌəʊvərɪksˌplɔɪˈteɪʃən/

overexploitation

Übernutzung
Meaning
The unsustainable use of natural resources at a rate that exceeds their ability to regenerate, leading to depletion and environmental degradation.
Example
Overexploitation of natural resources leads to environmental degradation.
Die Übernutzung natürlicher Ressourcen führt zu Umweltzerstörung.
B2 adjective /ˈaʊtˌɡoʊɪŋ/

outgoing

gesellig
Meaning
Friendly and sociable; inclined to mix with others.
Example
He is an outgoing person who loves meeting new people.
Er ist eine gesellige Person, die es liebt, neue Leute zu treffen.
C1 noun /əbˈzɜːrvətɔːri/

observatory

observatorium
Meaning
A building equipped for observing astronomical or meteorological events.
Example
The observatory is open to the public on weekends.
Das Observatorium ist am Wochenende für die Öffentlichkeit geöffnet.
B2 noun ˈɒksɪdʒən prəˈdʌkʃən

oxygen production

Sauerstoffproduktion
Meaning
The process of generating oxygen through photosynthesis or other means.
Example
Plants are vital for oxygen production and the maintenance of life.
Pflanzen sind entscheidend für die Sauerstoffproduktion und den Erhalt des Lebens.
B2 adjective /ˈɒp.ʃən.əl/

Optional

optional
Meaning
not compulsory; left to choice
Example
Wearing a tie is optional for this event.
Das Tragen einer Krawatte ist für diese Veranstaltung optional.
C1 noun /əbˈdʒɛktər/

objector

Widersacher
Meaning
a person who expresses opposition or disapproval to something
Example
The objector raised his concerns during the town meeting.
Der Widersacher äußerte seine Bedenken während der Stadtratssitzung.
C2 noun /ˈoʊvərlɔːrd/

overlord

Herrscher
Meaning
A ruler, master, or person of great power and authority over others.
Example
The peasants were forced to pay taxes to their overlord.
Die Bauern wurden gezwungen, Steuern an ihren Herrscher zu zahlen.
C1 verb ˈɔː.kɪ.streɪ.tɪd

orchestrated

orchestriert
Meaning
Planned or coordinated carefully and deliberately.
Example
The attacks were orchestrated with precision.
Die Angriffe wurden mit Präzision orchestriert.
B1 noun əbˈdʒek.tɪv

objective

ziel
Meaning
A thing aimed at or sought; a goal.
Example
The main objective is to test sustainability.
Das Hauptziel ist es, die Nachhaltigkeit zu testen.
B2 noun /ˈaʊtɪŋ/

outing

Ausflug
Meaning
a short trip or excursion, often for leisure or enjoyment
Example
They had a lovely outing at the beach last weekend.
Sie hatten einen schönen Ausflug zum Strand am letzten Wochenende.
C1 adjective /ˌaʊtˈspoʊkən/

Outspoken

offen
Meaning
frank; speaking directly
Example
She is known for being outspoken about social issues.
Sie ist dafür bekannt, offen über gesellschaftliche Themen zu sprechen.
C2 adjective /əbˈtruːsɪv/

obtrusive

aufdringlich
Meaning
noticeable in an unpleasant or unwelcome way; intrusive
Example
The advertisement was so obtrusive that it ruined the user’s experience.
Die Werbung war so aufdringlich, dass sie das Benutzererlebnis ruinierte.
C1 adjective /oʊˈbiːs/

obese

fettleibig
Meaning
Extremely overweight; having an excessive amount of body fat.
Example
The doctor advised the obese patient to adopt a healthier lifestyle.
Der Arzt riet dem übergewichtigen Patienten, einen gesünderen Lebensstil anzunehmen.
C2 noun /ˌɒstɛnˈteɪʃən/

ostentation

Prunk
Meaning
excessive display of wealth or knowledge intended to attract admiration or envy
Example
The billionaire’s party was full of ostentation and luxury.
Die Party des Milliardärs war voller Prunk und Luxus.
A1 verb, adjective /oʊn/

own

besitzen
Meaning
to possess something; belonging to oneself
Example
She owns a beautiful house in the city.
Sie besitzt ein schönes Haus in der Stadt.
C1 adjective /ˈɒm.ɪ.nəs/

Ominous

unheilvoll; drohend
Meaning
giving the impression that something bad will happen; threatening; foreboding
Example
The dark clouds looked ominous before the storm.
Die dunklen Wolken sahen ominös aus, bevor der Sturm kam.
A2 pronoun /aʊərˈsɛlvz/

ourselves

wir selbst
Meaning
used by the speaker to refer to themselves and one or more others as the object of the verb
Example
We should help ourselves before helping others.
Wir sollten uns selbst helfen, bevor wir anderen helfen.
B2 adverb /ˈɒdli/

oddly

seltsamerweise
Meaning
in a strange or unusual way; unexpectedly
Example
Oddly, he didn’t seem upset by the bad news.
Seltsamerweise schien er über die schlechte Nachricht nicht verärgert zu sein.
C1 adjective /ɒˈstɛnsəbl/

ostensible

scheinbar
Meaning
stated or appearing to be true, but not necessarily so
Example
His ostensible reason for leaving was illness, but many doubted it.
Sein scheinbarer Grund für das Verlassen war Krankheit, aber viele zweifelten daran.
B2 verb /ˌoʊvərˈpeɪ/

overpay

überbezahlen
Meaning
To pay more than is necessary or reasonable.
Example
She realized she had overpaid for the concert tickets.
Sie erkannte, dass sie für die Konzertkarten zu viel bezahlt hatte.
C1 adjective /ˌoʊvərˈbloʊn/

overblown

übertrieben
Meaning
excessively exaggerated or inflated
Example
The controversy was overblown by the media.
Die Kontroverse wurde von den Medien übertrieben dargestellt.
B1 adjective /əˈbiː.di.ənt/

Obedient

gehorsam
Meaning
willing to comply with orders or instructions; submissive
Example
The obedient student always follows the teacher's instructions.
Der gehorsame Schüler folgt immer den Anweisungen des Lehrers.
B2 noun ˈoʊzoʊn dɪˈpliʃən

ozone depletion

Ozonabbau
Meaning
The reduction in the amount of ozone in the Earth's stratosphere, leading to increased UV radiation.
Example
Ozone depletion increases UV radiation.
Ozonabbau erhöht die UV-Strahlung.
C1 adjective /ˌɔːrθəˈpiːdɪk/

orthopedic

bezieht sich auf die Korrektur von Knochen- oder Muskelverformungen
Meaning
Relating to the correction of deformities of bones or muscles.
Example
She visited an orthopedic surgeon for her back pain.
Sie besuchte einen orthopädischen Chirurgen wegen ihrer Rückenschmerzen.
B2 verb /ˌoʊvərˈduː/

overdo

übertreiben
Meaning
to do something too much; to exaggerate or carry to excess
Example
Don't overdo the exercise on your first day at the gym.
Übertreibe das Training am ersten Tag im Fitnessstudio nicht.
B2 verb /ˌoʊvərˈkʌm/

overcome

überwinden
Meaning
To succeed in dealing with a problem or difficulty.
Example
You can overcome procrastination with planning.
Du kannst die Prokrastination mit Planung überwinden.
C1 adjective /ˌɒstɛnˈteɪʃəs/

ostentatious

protzig
Meaning
Characterized by a showy or pretentious display intended to impress others.
Example
He wore an ostentatious gold chain to the party.
Er trug eine protzige goldene Kette zur Party.
C2 verb /ˈɑːblɪˌɡeɪt/

obligate

verpflichten
Meaning
to bind legally or morally; to compel someone to do something
Example
The contract obligates the company to provide timely service.
Der Vertrag verpflichtet das Unternehmen, rechtzeitig Service zu leisten.
C1 adverb /ˈaʊtwədli/

Outwardly

äußere Erscheinung; nach außen hin;
Meaning
on the surface; externally; in appearance
Example
Outwardly, he seemed calm, but inside he was nervous.
Äußerlich schien er ruhig zu sein, aber innerlich war er nervös.
C1 verb /ˌaʊtˈstrɪp/

outstrip

übertreffen
Meaning
To go faster or do better than someone or something; to surpass.
Example
The company outstripped its competitors in sales last year.
Das Unternehmen hat seine Konkurrenten im Verkauf im letzten Jahr übertroffen.
C2 noun /ɔːrˈθɑːɡrəfi/

orthography

Orthografie
Meaning
The conventional spelling system of a language.
Example
English orthography can be confusing for learners.
Die englische Orthografie kann für Lernende verwirrend sein.
B2 noun /ˈɒt.ər/

Otter

Otter
Meaning
a mammal with webbed feet that lives near water and feeds on fish
Example
The playful otter swam gracefully in the river.
Der verspielte Otter schwamm anmutig im Fluss.
C2 adjective /ˌoʊdəˈrɪfərəs/

odoriferous

wohlriechend
Meaning
having or giving off a smell, especially a strong or pleasant one
Example
The garden was filled with odoriferous flowers.
Der Garten war mit wohlriechenden Blumen gefüllt.
A2 noun /ˈɒbdʒɪkt/

object

Gegenstand
Meaning
a thing that can be seen and touched
Example
The table is an object in the room.
Der Tisch ist ein Gegenstand im Raum.
C1 verb /ˈoʊvərˌhɔːl/

overhaul

große Überholung
Meaning
to examine thoroughly and repair or improve something that is worn or ineffective
Example
The company decided to overhaul its outdated computer system.
Das Unternehmen entschied sich, sein veraltetes Computersystem zu überholen.
C2 noun /ˈɑb.lə.kwi/

Obloquy

harte Kritik oder verbaler Missbrauch; öffentliche Verurteilung
Meaning
harsh criticism or verbal abuse; strong public condemnation
Example
The politician faced obloquy after the scandal.
Der Politiker sah sich nach dem Skandal scharfer Kritik ausgesetzt.
B2 noun /ˌɒpəˈzɪʃən/

opposition

Opposition
Meaning
the action of opposing or resisting something
Example
The opposition to the new law was strong.
Die Opposition gegen das neue Gesetz war stark.
B2 adjective /ˌɑːp.təˈmɪs.tɪk/

optimistic

optimistisch
Meaning
hopeful and confident about the future
Example
She is optimistic about the success of her new project.
Sie ist optimistisch über den Erfolg ihres neuen Projekts.
C2 noun /ˈɔːrzmən/

Oarsman

Ruderer
Meaning
a person who rows a boat, especially as a member of a racing crew
Example
The experienced oarsman rowed the boat across the river.
Der erfahrene Ruderer ruderte das Boot über den Fluss.
B1 adjective /ˌoʊld ˈfæʃənd/

old-fashioned

altmodisch
Meaning
not modern; belonging to an earlier time
Example
He still wears an old-fashioned hat.
Er trägt immer noch einen altmodischen Hut.
C1 noun /oʊˈmɪʃ.ən/

Omission

Auslassung; Unterlassung
Meaning
the action of excluding or leaving out someone or something; a failure to include
Example
The omission of his name from the list was intentional.
Die Auslassung seines Namens von der Liste war absichtlich.
B2 verb /ˌoʊvərˈtɜrn/

overturn

umkehren / eine Entscheidung aufheben
Meaning
to turn something upside down or to reverse a decision or judgment
Example
The court decided to overturn the previous ruling.
Das Gericht entschied sich, das vorherige Urteil aufzuheben.
C2 adjective /ɒmˈnɪʃ.ənt/

Omniscient

allwissend
Meaning
having complete knowledge; all-knowing
Example
The narrator in the novel appears to be omniscient, knowing every character's thoughts.
Der Erzähler im Roman scheint omniscient zu sein, da er die Gedanken aller Charaktere kennt.
B1 adjective /ˈaʊtər/

outer

äußeren
Meaning
situated on or toward the outside; external
Example
The outer layer of the jacket is waterproof.
Die äußere Schicht der Jacke ist wasserdicht.
C1 verb /ˈɒfsɛt/

offset

ausgleichen
Meaning
To counterbalance or compensate for something.
Example
The company's losses were offset by gains in other departments.
Die Verluste des Unternehmens wurden durch Gewinne in anderen Abteilungen ausgeglichen.
A1 adjective/adverb /ˈoʊnli/

only

nur
Meaning
without others; solely
Example
He is the only person who knows the secret.
Er ist die einzige Person, die das Geheimnis kennt.
C2 noun ˌɒbfəsˈkeɪʃən

obfuscation

Obfuskation, Verwirrung
Meaning
The action of making something obscure, unclear, or unintelligible.
Example
The obfuscation of the data made it difficult to interpret.
Die Obfuskation der Daten erschwerte deren Interpretation.
B2 adjective /aʊtˈstændɪŋ/

outstanding

herausragend
Meaning
extremely good or impressive; not yet resolved or paid
Example
She received an award for her outstanding performance.
Sie erhielt einen Preis für ihre herausragende Leistung.
C2 noun /əˈprəʊ.bri.əm/

opprobrium

Verachtung, Schande
Meaning
Harsh criticism or public disgrace.
Example
The scandal brought opprobrium on the politician.
Der Skandal brachte Verachtung für den Politiker.
C1 adjective /əbˈnɒkʃəs/

Obnoxious

anstößig
Meaning
extremely unpleasant; offensive; annoying
Example
His obnoxious behavior at the party annoyed everyone.
Sein anstößiges Verhalten auf der Party ärgerte alle.
C1 noun /ˈɑːdəsi/

odyssey

lange Reise
Meaning
a long, adventurous journey; a series of experiences
Example
Her career has been an odyssey of challenges and achievements.
Ihre Karriere war eine Odyssee aus Herausforderungen und Erfolgen.
C1 adjective /əˈblɪɡ.ə.tɔː.ri/

obligatory

obligatorisch
Meaning
Required by a legal, moral, or other rule; compulsory.
Example
Wearing a seatbelt is obligatory in most countries.
Das Tragen eines Sicherheitsgurts ist in den meisten Ländern obligatorisch.
C2 noun /ˈɒlɪv bɑːb/

Olive barb

Olivenbarbe
Meaning
A small freshwater fish with olive-colored body and barbels
Example
The olive barb is commonly found in South Asian rivers.
Die Olivenbarbe kommt häufig in südasiatischen Flüssen vor.
C2 noun /ˌɒpəˈrɛtə/

operetta

leichte Oper
Meaning
a short opera with light and humorous themes
Example
The theater staged a famous operetta by Gilbert and Sullivan.
Das Theater inszenierte eine berühmte Operette von Gilbert und Sullivan.
C2 verb ˈɑːb.fə.skeɪt

obfuscate

verschleiern, unklar machen, verwirren
Meaning
Render obscure, unclear, or unintelligible.
Example
Politicians often obfuscate facts to mislead people.
Politiker verschleiern oft Fakten, um die Menschen zu täuschen.
B1 noun /ˈɑp.ʃən/

Option

Option
Meaning
a thing that is or may be chosen; an alternative course of action
Example
You have the option to work from home or office.
Du hast die Option, von zu Hause oder im Büro zu arbeiten.
C1 noun /ˈɒptɪks/

optics

Optik
Meaning
The branch of physics dealing with light and vision.
Example
She studied optics to understand how lenses work.
Sie studierte Optik, um zu verstehen, wie Linsen funktionieren.
C2 adjective /ˌɔːfˈkiː/

off-key

falsch
Meaning
out of tune; not in accordance with expected standards
Example
The singer was slightly off-key during the performance.
Der Sänger war während der Aufführung leicht falsch.
B2 noun /əˌrɪʒ.əˈnæl.ə.ti/

Originality

Originalität
Meaning
the quality of being novel or unusual; the ability to think independently and creatively
Example
The artist's work showed great originality and creativity.
Das Werk des Künstlers zeigte große Originalität und Kreativität.
C1 noun /oʊˈeɪ.sɪs/

Oasis

Oase
Meaning
a fertile spot in a desert where water is found; a pleasant refuge
Example
The travelers found an oasis after days in the desert.
Die Reisenden fanden eine Oase nach mehreren Tagen in der Wüste.
B1 adjective, adverb /ˈoʊvərɔːl/

overall

insgesamt
Meaning
in general or as a whole
Example
Overall, the project has been successful.
Insgesamt war das Projekt erfolgreich.
C2 verb /əbˈvɜːrt/

obvert

umkehren
Meaning
To turn something so as to face in a different direction; in logic, to convert a proposition by negating both subject and predicate.
Example
The teacher asked the students to obvert the statement for practice.
Der Lehrer bat die Schüler, die Aussage zum Üben zu obvertieren.
C1 noun /ˈɒktɪv/

octave

Oktave
Meaning
A series of eight musical notes, or the interval between one musical pitch and another with double its frequency.
Example
The singer's voice could easily reach the higher octave.
Die Stimme eines Sängers konnte leicht die höhere Oktave erreichen.
C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

orthogonal
Meaning
at right angles; independent or unrelated
Example
In mathematics, two vectors are orthogonal if their dot product is zero.
In der Mathematik sind zwei Vektoren orthogonal, wenn ihr Skalarprodukt null ist.
C2 noun /ˈɒb.stɪ.nə.si/

obstinacy

Eigensinn
Meaning
Stubborn refusal to change one's opinion or chosen course of action, despite attempts to persuade one to do so.
Example
His obstinacy made negotiations difficult.
Sein Eigensinn erschwerte die Verhandlungen.
B2 noun /ˈoʊvərpæs/

overpass

Brücke
Meaning
A bridge that carries one road or railway over another.
Example
The new overpass reduced traffic congestion in the city.
Die neue Brücke reduzierte den Verkehrsstau in der Stadt.
A2 noun /ˈʌv.ən/

Oven

ofen
Meaning
an enclosed compartment used for heating, baking, or drying food
Example
She baked cookies in the oven for thirty minutes.
Sie backte Kekse im Ofen für dreißig Minuten.
C2 adjective /əbˈsiːkwɪəs/

obsequious

kriecherisch
Meaning
Excessively obedient or attentive in a servile way.
Example
The waiter gave an obsequious bow to every customer.
Der Kellner machte eine kriecherische Verbeugung vor jedem Kunden.
C1 adjective /ˈɔːrdɪnəl/

ordinal

ordinal
Meaning
Relating to the order or position of something in a sequence (first, second, third, etc.).
Example
The ordinal number 'third' indicates position in a sequence.
Die Ordinalzahl 'dritte' zeigt die Position in einer Sequenz an.
C1 verb /əbˈstrʌkt/

obstruct

blockieren
Meaning
to block or hinder progress; to prevent or impede movement
Example
The fallen tree obstructed the road for several hours.
Der gefallene Baum blockierte die Straße mehrere Stunden lang.
C2 verb /ˈɑːbdʒərˌɡeɪt/

objurgate

heftig schimpfen
Meaning
to scold or rebuke severely
Example
The teacher objurgated the student for being dishonest.
Der Lehrer schimpfte mit dem Schüler, weil er unehrlich war.
C2 noun /ˌɔːrnɪˈθɑːlədʒi/

ornithology

Ornithologie
Meaning
the scientific study of birds
Example
She pursued ornithology to understand the migration patterns of birds.
Sie verfolgte die Ornithologie, um die Zugmuster der Vögel zu verstehen.
A2 adjective /əˈlɪmpɪk/

olympic

olympisch
Meaning
related to the Olympic Games, a major international sporting event
Example
She trained hard to compete in the Olympic Games.
Sie trainierte hart, um an den Olympischen Spielen teilzunehmen.
C1 noun /ɔːr/

Oar

Ruder
Meaning
a long pole with a flat blade used to row a boat
Example
He dipped the oar into the water and pulled the boat forward.
Er tauchte das Ruder ins Wasser und zog das Boot vorwärts.
A1 noun /ɒkˈtoʊbər/

october

Oktober
Meaning
the tenth month of the year in the Gregorian calendar
Example
The weather becomes cooler in October.
Im Oktober wird das Wetter kühler.
C1 noun /ˈoʊvərˌtoʊn/

overtone

subtile Bedeutung
Meaning
A subtle quality, implication, or additional meaning beyond the obvious.
Example
His speech had political overtones that were hard to ignore.
Seine Rede hatte politische Untertöne, die schwer zu ignorieren waren.
A2 noun əˈlɪm.pɪk ɡeɪmz

Olympic Games

olympische spiele
Meaning
The world's largest international sports competition held every four years, bringing together athletes from different countries to compete in various sports.
Example
The Olympic Games bring together the world's top athletes.
Die Olympischen Spiele bringen die besten Athleten der Welt zusammen.
B2 adjective /ˌfæʃ.ənd/

Outdated

veraltet
Meaning
obsolete; no longer current
Example
This computer software is completely outdated.
Diese Software ist vollständig veraltet.
C2 adjective /ˈoʊ.kən/

oaken

aus Eichenholz
Meaning
made of or resembling oak wood
Example
The villagers gathered around the oaken table in the hall.
Die Dorfbewohner versammelten sich um den Eichentisch in der Halle.
C1 verb /ˌaʊtˈduː/

outdo

übertreffen
Meaning
To do better than someone else; to surpass.
Example
She always tries to outdo her classmates in exams.
Sie versucht immer, ihre Klassenkameraden in Prüfungen zu übertreffen.
C1 adjective /ɒmˈnɪv.ər.əs/

Omnivorous

allesfresser
Meaning
eating both plants and animals; feeding on various kinds of food
Example
Bears are omnivorous animals that eat both plants and meat.
Bären sind allesfressende Tiere, die sowohl Pflanzen als auch Fleisch essen.
B1 adjective /əˈrɪdʒ.ɪ.nəl/

Original

original; primär; authentisch
Meaning
first; fundamental; primary; authentic
Example
This is the original document, not a copy.
Dies ist das Originaldokument, keine Kopie.
B2 noun ˈaʊt.pʊt

output

produktion
Meaning
The amount of something produced by a person, machine, or industry.
Example
Climate change reduces agricultural output.
Der Klimawandel verringert die landwirtschaftliche Produktion.
B1 noun /aʊl/

Owl

Eule
Meaning
a nocturnal bird of prey with large eyes and a hooked beak
Example
The owl hooted softly in the darkness of the forest.
Die Eule rief leise in der Dunkelheit des Waldes.
C2 verb /ˌoʊvərˈliːp/

overleap

überhüpfen
Meaning
To jump over something; to omit or disregard something.
Example
He managed to overleap the fence easily.
Er schaffte es, den Zaun problemlos zu überspringen.
C2 noun /ˈɒrɪz(ə)n/

orison

Gebet
Meaning
a prayer, especially a devout or formal one
Example
He whispered a quiet orison before going to sleep.
Er flüsterte ein stilles Gebet, bevor er ins Bett ging.