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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.
C2 verb /oʊˈpaɪn/

opine

eine Meinung äußern
Meaning
to express an opinion or belief
Example
The professor opined that the policy would fail.
Der Professor äußerte die Meinung, dass die Politik scheitern würde.
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.
B2 noun ɔːˈɡæn.ɪk fuːdz

organic foods

biologische Lebensmittel
Meaning
Food produced without the use of chemicals such as artificial pesticides, fertilizers, or other artificial agents.
Example
Organic foods are healthier than processed foods.
Biologische Lebensmittel sind gesünder als verarbeitete Lebensmittel.
B2 adjective /ˈɒnɡəʊɪŋ/

ongoing

laufend
Meaning
continuing; still in progress
Example
The ongoing project will finish next month.
Das laufende Projekt wird nächsten Monat abgeschlossen sein.
B2 adjective + noun ˈɒptɪməl ˈtempərətʃər

optimal temperature

optimale Temperatur
Meaning
The best or most favorable temperature for a particular purpose
Example
Winter provides optimal temperature for farming.
Der Winter bietet die optimale Temperatur für die Landwirtschaft.
C2 verb /əˈkluːd/

occlude

verstopfen
Meaning
To block or close up an opening or passage.
Example
The pipe was occluded by mineral deposits.
Das Rohr war durch Mineralablagerungen blockiert.
C1 noun /ˈɔːrkɪd/

Orchid

Orchidee
Meaning
a diverse family of flowering plants known for their exotic and often fragrant flowers
Example
The white orchid on the windowsill bloomed for months.
Die weiße Orchidee auf dem Fensterbrett blühte monatelang.
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.
B2 noun /ˈɔːrɡənaɪzər/

organizer

Organisator
Meaning
a person who arranges or coordinates activities, events, or groups; a tool or item used to keep things in order
Example
She worked as the main organizer of the international conference.
Sie war die Hauptorganisatorin der internationalen Konferenz.
A2 adjective /ˈɒb.vi.əs/

Obvious

offensichtlich; leicht zu verstehen
Meaning
easily perceived or understood; clear and apparent to the mind
Example
It was obvious that she was upset about something.
Es war offensichtlich, dass sie über etwas verärgert war.
A2 noun /əˈlɪmpɪks/

olympics

Olympische Spiele
Meaning
an international sports competition held every four years with athletes from many countries
Example
The Olympics bring athletes from all over the world together.
Die Olympischen Spiele bringen Athleten aus der ganzen Welt zusammen.
B1 verb /ˈɒpəreɪt/

operate

bedienen
Meaning
to function; to control or manage; to perform surgery
Example
The surgeon will operate on the patient tomorrow.
Der Chirurg wird den Patienten morgen operieren.
C1 adjective /ˈɒptɪkəl/

optical

optisch
Meaning
related to or used in seeing or sight
Example
The optical illusion fooled everyone at the exhibition.
Die optische Täuschung täuschte alle auf der Ausstellung.
C1 verb /aʊtˈlɪv/

outlive

überleben
Meaning
to live longer than someone or something else
Example
She outlived all her siblings.
Sie hat alle ihre Geschwister überlebt.
B2 adjective /aʊtˈreɪdʒəs/

outrageous

empörend
Meaning
Shockingly bad or excessive; very unusual or amusing.
Example
The comedian told an outrageous joke.
Der Komiker erzählte einen empörenden Witz.
C2 noun /oʊf/

Oaf

eine tollpatschige, dumme oder unsensible Person
Meaning
a clumsy, stupid, or insensitive person
Example
Don't be such an oaf - handle the dishes carefully!
Sei kein Oaf – gehe mit den Tellern vorsichtig um!
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 (plural) /ˈɔːrdʒiːz/

orgies

Orgien
Meaning
Wild gatherings involving excessive indulgence in food, drink, or sexual activity.
Example
The ancient Romans were infamous for their lavish feasts and orgies.
Die alten Römer waren berüchtigt für ihre prächtigen Festessen und Orgien.
C2 noun /oʊd/

ode

Ode
Meaning
a lyrical poem, often expressing praise or strong emotions
Example
The poet wrote an ode to the beauty of nature.
Der Dichter schrieb eine Ode an die Schönheit der Natur.
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.
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 adjective /ˈoʊ.pən ˈhɑrt.ɪd/

Open-hearted

offenherzig; großzügig und aufrichtig; herzlich empfangend;
Meaning
Kind and generous; sincere and honest; warmly receptive;
Example
She welcomed the strangers with an open-hearted smile and invited them for dinner.
Sie begrüßte die Fremden mit einem offenen Lächeln und lud sie zum Abendessen ein.
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.
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.
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.
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.
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.
C1 noun /ˈɔr.ə.tər/

Orator

Redner
Meaning
a public speaker, especially one who is eloquent or skilled in speaking
Example
The famous orator delivered an inspiring speech.
Der berühmte Redner hielt eine inspirierende Rede.
B2 noun /ˈaʊtskɜːrts/

outskirts

Vororte der Stadt
Meaning
The outer parts of a town or city, away from the center.
Example
They moved to the outskirts of the city for a quieter life.
Sie zogen in die Vororte der Stadt für ein ruhigeres Leben.
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 adjective /oʊˈvɜːrt/

overt

offen
Meaning
Done or shown openly; not hidden or secret.
Example
There was an overt display of hostility between the rivals.
Es gab eine offene Darstellung von Feindseligkeit zwischen den Rivalen.
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.
B2 noun /əˈfens/

Offence

Verstoß; Straftat; Angriff
Meaning
a breach of law or rule; an annoyance or resentment
Example
Stealing is a serious offence punishable by law.
Diebstahl ist ein schweres Vergehen, das gesetzlich bestraft wird.
C1 verb /ɔːrˈdeɪn/

ordain

ordnen
Meaning
To officially make someone a priest or minister; to decree or order something officially.
Example
The bishop will ordain three new priests this Sunday.
Der Bischof wird an diesem Sonntag drei neue Priester ordinieren.
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 noun /ˈoʊvərˌsiːər/

overseer

Aufseher
Meaning
a person who supervises work or workers; a manager
Example
The overseer made sure the workers followed safety rules.
Der Aufseher stellte sicher, dass die Arbeiter die Sicherheitsregeln befolgten.
C2 noun /ˈɔː.rɪ.fɪs/

orifice

Öffnung
Meaning
an opening or hole, especially in the body or a device
Example
The medicine was applied through a small orifice in the device.
Das Medikament wurde durch ein kleines Loch im Gerät aufgetragen.
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.
C1 verb /ˈɒs.ɪ.leɪt/

oscillate

sich hin und her bewegen oder schwingen zwischen zwei Punkten oder Zuständen
Meaning
To swing or move back and forth between two points or states
Example
The stock market tends to oscillate during uncertain times.
Der Aktienmarkt tendiert dazu, sich in unsicheren Zeiten zu bewegen.
B2 noun/verb /ˈoʊvərˌdoʊs/

overdose

überdosis
Meaning
An excessive and dangerous amount of a drug; to take too much of a substance.
Example
He was rushed to the hospital after a drug overdose.
Er wurde nach einer Drogenüberdosis ins Krankenhaus eingeliefert.
B2 adjective /ˈɔɪl.i/

Oily

ölig; mit Öl bedeckt; fettig
Meaning
covered with oil; containing oil; greasy
Example
Her oily skin needs special care.
Ihre ölige Haut braucht besondere Pflege.
B2 noun /ˌɑb.zɚˈveɪ.ʃən/

Observation

Beobachtung
Meaning
the action of watching something carefully; a comment or remark
Example
The scientist made careful observations of the experiment.
Der Wissenschaftler machte sorgfältige Beobachtungen des Experiments.
C1 noun /əˈkɜr.əns/

Occurrence

Vorkommen
Meaning
an instance or event of something happening; the fact of occurring
Example
The occurrence of earthquakes is common in this region.
Das Vorkommen von Erdbeben ist in dieser Region üblich.
B2 adjective ˌɒp.ərˈeɪ.ʃən.əl

operational

betrieblich
Meaning
In working order; ready for use.
Example
The space project will be operational by 2025.
Das Weltraumprojekt wird bis 2025 operational sein.
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.
C2 adjective /ˈɒsiəs/

osseous

knochig
Meaning
consisting of or turned into bone; bony
Example
The fossil showed osseous structures of the ancient creature.
Das Fossil zeigte ossäre Strukturen des alten Wesens.
B2 noun /ˈoʊ.vər ɡroʊθ/

Over growth

Überwuchs
Meaning
excessive growth beyond normal size; too much development or expansion
Example
The overgrowth of weeds made the garden look untidy.
Der Überwuchs des Unkrauts ließ den Garten ungeordnet erscheinen.
B2 noun oʊˈbiː.sə.t̬i

obesity

Fettleibigkeit
Meaning
The condition of being grossly fat or overweight.
Example
Obesity increases the risk of diabetes and heart disease.
Fettleibigkeit erhöht das Risiko für Diabetes und Herzkrankheiten.
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.
C1 adjective /əˈkʌlt/

occult

okkult
Meaning
Relating to mysterious, supernatural, or magical powers and practices.
Example
She had always been fascinated by the occult and its hidden knowledge.
Sie war immer fasziniert vom Okkulten und dessen verborgenen Wissen.
C2 noun /ˌɑːpərˈtuːnɪzəm/

opportunism

Opportunismus
Meaning
The practice of taking advantage of opportunities regardless of principles or ethics.
Example
His decision was driven by opportunism, not values.
Seine Entscheidung wurde durch Opportunismus motiviert, nicht durch Werte.
B2 noun/verb /ˈaʊtreɪdʒ/

outrage

Empörung
Meaning
A strong feeling of anger and shock; to arouse anger or shock.
Example
The unfair decision caused public outrage.
Die ungerechte Entscheidung verursachte öffentliche Empörung.
B2 adjective /ˈɔː.rəl/

Oral

mündlich; bezogen auf den Mund
Meaning
spoken rather than written; relating to the mouth
Example
The oral examination will test your speaking skills.
Die mündliche Prüfung wird Ihre Sprechfähigkeiten testen.
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.
A1 adjective /əʊˈkeɪ/

okay

in Ordnung
Meaning
used to express agreement or acceptance
Example
It's okay to leave early today.
Es ist in Ordnung, heute früher zu gehen.
A2 noun /ˈoʊ.ʃən/

ocean

Ozean
Meaning
A very large expanse of sea, especially the main areas of sea between continents.
Example
The ocean covers more than 70% of the Earth's surface.
Der Ozean bedeckt mehr als 70% der Erdoberfläche.
C1 verb /ˌaʊtˈstrɛtʃ/

outstretch

ausstrecken
Meaning
To extend or stretch something outward.
Example
He outstretched his hand to help her up.
Er streckte seine Hand aus, um ihr zu helfen.
A1 adverb /aʊt/

out

draußen
Meaning
moving or appearing away from the inside or center; not at home or present
Example
He stepped out of the room quietly.
Er trat leise aus dem Raum.
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 noun/verb /ˈoʊvərˌhæŋ/

overhang

Überhang
Meaning
To extend outward and hang over something; a projecting part.
Example
The roof overhang provides shade in the summer.
Das Überhängen des Dachs bietet im Sommer Schatten.
C2 noun /əˈblɪkwɪti/

obliquity

Schiefe
Meaning
Deviation from moral or usual conduct; indirectness or lack of straightforwardness.
Example
The politician was criticized for the obliquity of his answers.
Der Politiker wurde wegen der Schiefe seiner Antworten kritisiert.
C1 verb /ˌoʊvərˈriːtʃ/

overreach

Überforderung
Meaning
to go beyond what is proper, acceptable, or achievable; to overextend
Example
The politician overreached by making promises he couldn't keep.
Der Politiker hat sich übernommen, indem er Versprechungen gemacht hat, die er nicht einhalten konnte.
C2 noun /ˈɒfərtɔːri/

offertory

Opfergabe
Meaning
The part of a religious service when offerings are collected; the offering itself.
Example
The offertory was taken during the Sunday service.
Die Opfergabe wurde während des Sonntagsgottesdienstes entgegengenommen.
C2 noun /ˈɔːrdʒi/

orgy

Orgie
Meaning
A wild party involving excessive indulgence, especially of a sexual nature.
Example
The novel described a scandalous orgy in a wealthy mansion.
Der Roman beschrieb eine skandalöse Orgie in einer wohlhabenden Villa.
C1 verb /ˈɒp.tɪ.maɪz/

optimize

optimieren
Meaning
To make the best or most effective use of a situation, opportunity, or resource.
Example
The company is working to optimize its supply chain.
Das Unternehmen arbeitet daran, seine Lieferkette zu optimieren.
C2 noun /ˌoʊpəˈlɛsəns/

opalescence

Opaleszenz
Meaning
a milky or pearly appearance of a surface like that of an opal
Example
The pearl had a gentle opalescence under the light.
Die Perle hatte eine sanfte Opaleszenz im Licht.
A1 conjunction /ɔːr/

or

oder
Meaning
used to link alternatives
Example
You can have tea or coffee.
Du kannst Tee oder Kaffee haben.
A2 modal verb /ɔːt/

ought

sollte
Meaning
Used to indicate duty, correctness, or moral obligation.
Example
You ought to respect your elders.
Du solltest deine Älteren respektieren.
C1 noun /ˈɔːr.ə.tɔːr.i/

oratory

Rhetorik
Meaning
The art of public speaking; skilled and confident delivery of speeches to an audience.
Example
His exceptional oratory skills won him the debate competition.
Seine außergewöhnlichen oratorischen Fähigkeiten verschafften ihm den Sieg im Debattierwettbewerb.
C2 adjective /ɑːlˈfæktəri/

olfactory

olfaktorisch
Meaning
Relating to the sense of smell.
Example
The perfume activated her olfactory nerves immediately.
Das Parfüm aktivierte sofort ihre Riechnerven.
C1 adjective /əˈprɛs.ɪv/

Oppressive

unterdrückend
Meaning
Harsh and authoritarian; overwhelming; causing distress; tyrannical;
Example
The oppressive heat made it difficult to work outside during the summer.
Die drückende Hitze erschwerte die Arbeit im Freien während des Sommers.
C1 noun /ˈɒn.slɔːt/

onslaught

Angriff
Meaning
A fierce or destructive attack.
Example
The village faced an onslaught of enemy forces.
Das Dorf sah sich einem Angriff der feindlichen Truppen gegenüber.
B1 adverb /əˈrɪdʒɪnəli/

originally

ursprünglich
Meaning
in the beginning, at first
Example
Originally, she wanted to be a doctor.
Ursprünglich wollte sie Ärztin werden.
B2 verb /əˈfend/

offend

beleidigen
Meaning
to cause displeasure or resentment; to hurt someone's feelings
Example
His rude comments offended many people at the meeting.
Seine unhöflichen Kommentare haben viele Menschen bei dem Treffen beleidigt.
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.
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 /oʊˈbeɪsəns/

obeisance

Ehrerbietung
Meaning
A gesture of respect such as a bow or curtsy.
Example
They bowed in obeisance to the king.
Sie verbeugten sich in Ehrerbietung vor dem König.
B2 noun ˈəʊnəʃɪp

ownership

Eigentum
Meaning
The act, state, or right of possessing something; legal title to something.
Example
Ownership of resources was crucial.
Das Eigentum an Ressourcen war entscheidend.
C1 noun ˌɒk.sɪˈdeɪ.ʃən

oxidation

Oxidation
Meaning
A chemical reaction that involves the combination of a substance with oxygen, often causing deterioration.
Example
Oxidation causes metal surfaces to weaken.
Die Oxidation schwächt Metalloberflächen.
A1 pronoun /ˈʌðərz/

others

andere
Meaning
people or things distinct from the ones already mentioned or known
Example
I like to spend time with others.
Ich verbringe gerne Zeit mit anderen.
C2 noun /ˈɔːrɪndʒfɪn ˈleɪbiːoʊ/

Orangefin labeo

Orangeflossen-Labeo
Meaning
a freshwater fish species native to South Asian rivers, commonly found in Bangladesh and India
Example
The orangefin labeo is an important food fish in Bangladesh.
Der Orangeflossen-Labeo ist ein wichtiger Speisefisch in Bangladesch.
C1 adjective /əbˈstrʌk.tɪv/

Obstructive

hemmend
Meaning
deliberately creating difficulties or preventing progress; hindering or blocking something
Example
The obstructive policies hindered economic growth.
Die hemmenden Maßnahmen behinderten das Wirtschaftswachstum.
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.
C2 verb /ˈɑːskjʊleɪt/

osculate

küssen
Meaning
To kiss.
Example
They osculated under the mistletoe during the party.
Sie küssten sich unter dem Mistelzweig während der Party.
C1 verb /əbˈsɛs/

obsess

besessen sein von
Meaning
To preoccupy or fill the mind of someone continually and to an excessive degree.
Example
She tends to obsess over small details.
Sie neigt dazu, sich über kleine Details zu besessen.
B1 noun ˌɒpəˈtjuːnɪtiz

opportunities

Gelegenheiten
Meaning
A set of circumstances that makes it possible to do something; chances for advancement or success.
Example
Opportunities for jobs decreased.
Die Gelegenheiten für Jobs nahmen ab.
B2 adjective /ˌoʊvərˈwɛlmɪŋ/

overwhelming

überwältigend
Meaning
Very intense; overpowering.
Example
Large tasks can feel overwhelming.
Große Aufgaben können überwältigend wirken.
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.
C2 adjective /ɒmˈnɪp.ə.tənt/

omnipotent

allmächtig
Meaning
Having unlimited power; able to do anything; all-powerful.
Example
In many religions, God is considered omnipotent.
In vielen Religionen wird Gott als omnipotent angesehen.
C2 noun /ɒmˈnɪpətəns/

omnipotence

Omnipotenz
Meaning
The quality of having unlimited power or authority.
Example
Many religions describe God’s omnipotence as absolute.
Viele Religionen beschreiben die Omnipotenz Gottes als absolut.
A1 adverb /ˈɔːfən/

often

oft
Meaning
frequently, many times
Example
I often visit my grandparents on weekends.
Ich besuche oft meine Großeltern am Wochenende.
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.
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.
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.
C1 noun /ˌɒbstəˈtrɪʃən/

obstetrician

Geburtshelfer
Meaning
A doctor specializing in pregnancy, childbirth, and women's reproductive health.
Example
The obstetrician monitored the mother’s health throughout the pregnancy.
Der Geburtshelfer überwachte die Gesundheit der Mutter während der Schwangerschaft.
C2 noun /ˈɔːrdnəns/

ordnance

militärische Ausrüstung
Meaning
Military supplies including weapons, ammunition, and combat equipment.
Example
The army stored ordnance in a secure facility outside the city.
Die Armee lagerte militärische Ausrüstung in einer sicheren Einrichtung außerhalb der Stadt.
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.
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.
B1 verb /əbˈzɜːrv/

observe

beobachten
Meaning
to watch carefully; to notice or perceive something
Example
Scientists observe the behavior of animals in the wild.
Wissenschaftler beobachten das Verhalten von Tieren in der Wildnis.
C2 noun /ɒkˈteɪvoʊ/

octavo

Oktavo (Buchgröße, die durch das Falten eines Blattes in acht Teile entsteht)
Meaning
A size of book page resulting from folding a sheet of paper into eight leaves (sixteen pages).
Example
The old library contained rare octavo editions of Shakespeare.
Die alte Bibliothek enthielt seltene Oktavo-Ausgaben von Shakespeare.
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 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 adjective /əˈfɪʃəl/

official

offiziell
Meaning
relating to or connected with an authority or public office
Example
He is the official spokesperson for the company.
Er ist der offizielle Sprecher des Unternehmens.
C2 adjective /əbˈstrɛpərəs/

obstreperous

laut und schwer zu kontrollieren
Meaning
Noisy and difficult to control.
Example
The obstreperous students disrupted the class.
Die lauten Studenten störten die Klasse.
A2 adjective /ˈaʊtdɔːr/

outdoor

im Freien
Meaning
situated, existing, or done outside a building
Example
We planned an outdoor picnic for the weekend.
Wir haben ein Picknick im Freien für das Wochenende geplant.
C1 adjective ˈɒptɪmaɪzd

optimized

optimiert, verbessert, effizienter
Meaning
Made as fully perfect, functional, or effective as possible; improved to achieve maximum efficiency.
Example
The system has been optimized for faster performance.
Das System wurde für eine schnellere Leistung optimiert.
C2 noun /ˈoʊɡər/

ogre

Oger
Meaning
A mythical monster, often depicted as large, hideous, and cruel; metaphorically, a cruel or terrifying person.
Example
The villagers feared the ogre who lived in the dark forest.
Die Dorfbewohner fürchteten den Oger, der im dunklen Wald lebte.
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 noun /ˈaʊtˌɡroʊθ/

outgrowth

Auswuchs
Meaning
something that grows out of something else; a natural development or result
Example
The new policy was an outgrowth of years of debate.
Die neue Politik war ein Auswuchs jahrelanger Debatten.
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 /ˌɔːrəˈtɔːri.oʊ/

oratorio

religiöse Musikkomposition
Meaning
A large-scale musical composition for orchestra, choir, and soloists, usually on a sacred theme, performed without costumes or scenery.
Example
Handel's 'Messiah' is one of the most famous oratorios ever written.
Handels 'Messias' ist eines der bekanntesten Oratorien, die je geschrieben wurden.
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.
C1 noun /ˈɒktəɡən/

octagon

Acht-Eck
Meaning
A polygon with eight sides and eight angles.
Example
The stop sign is shaped like an octagon.
Das Stoppschild hat die Form eines Achtecks.
C2 noun /ˈəʊpəs/

opus

kreatives Werk
Meaning
A creative work, especially a large and important piece of music or art.
Example
The composer considered the symphony his greatest opus.
Der Komponist betrachtete die Sinfonie als sein größtes kreatives Werk.
A1 preposition, adverb /ˈoʊvər/

over

über
Meaning
across, on top of, or beyond
Example
The book is lying over the table.
Das Buch liegt über dem Tisch.
B1 verb অকার্স

occurs

tritt auf
Meaning
Happens or takes place, especially as a result of something.
Example
Snowfall occurs in regions with freezing temperatures.
Schneefall tritt in Regionen mit Temperaturen unter dem Gefrierpunkt auf.
B2 verb /əbˈteɪn/

obtain

erhalten
Meaning
to get or acquire something
Example
You need to obtain a visa before traveling abroad.
Du musst ein Visum erhalten, bevor du ins Ausland reist.
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.
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.
C1 adjective ˈɒk.sɪ.də.tɪv

oxidative

Mit Oxidation verbunden
Meaning
Related to or caused by oxidation, especially cellular damage from free radicals.
Example
Excess stress can lead to oxidative damage in cells.
Übermäßiger Stress kann oxidativen Schaden in Zellen verursachen.