Odour
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B2 noun /ˈoʊ.dər/

Odour

Geruch
Meaning
a distinctive smell, especially an unpleasant one
Example
The odour of fresh bread filled the kitchen.
Der Geruch von frischem Brot füllte die Küche.
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.
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 verb əˈblɪt.ə.reɪt

obliterate

vernichten
Meaning
To destroy utterly; wipe out completely, to erase or remove something completely.
Example
The storm obliterated entire villages.
Der Sturm vernichtete ganze Dörfer.
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.
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.
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.
C1 adjective /ˌɔːrnəˈmɛntl/

ornamental

ornamental
Meaning
Serving as decoration; decorative rather than functional.
Example
The garden was filled with ornamental plants.
Der Garten war mit ornamentalen Pflanzen gefüllt.
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 verb /ˌoʊvərˈθroʊ/

overthrow

Glück
Meaning
To remove a leader or government from power, often by force.
Example
The rebels planned to overthrow the corrupt regime.
Sie konnte ihr Glück nicht verbergen, als sie den Preis erhielt.
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 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.
B2 noun /ˌoʊ.vɚˈkraʊ.dɪŋ/

overcrowding

übermäßige Menschenansammlungen
Meaning
Excessive crowd or packed condition, having more people or vehicles in a place than the approved capacity.
Example
The subway system suffers from severe overcrowding during peak hours.
Das U-Bahn-System leidet während der Hauptverkehrszeiten unter schwerer Überfüllung.
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.
C1 adjective /ˌaʊtˈlændɪʃ/

outlandish

seltsam
Meaning
Looking or sounding bizarre or unfamiliar; strange.
Example
He wore an outlandish costume to the festival.
Er trug ein seltsames Kostüm zum Festival.
B2 noun /ˈaʊt.kʌm/

Outcome

Ergebnis; Folge;
Meaning
the result or consequence of an action or situation; the final product
Example
The outcome of the election surprised everyone.
Das Ergebnis der Wahl überraschte alle.
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.
C1 noun /ˌɒk.sɪ.dʒɪˈneɪ.ʃən/

oxygenation

Sauerstoffversorgung oder -behandlung
Meaning
The process of supplying or treating with oxygen.
Example
Deep breathing exercises improve oxygenation of the body.
Tiefenatmungsübungen verbessern die Sauerstoffversorgung des Körpers.
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.
C1 verb /əˈprɛs/

oppress

unterdrücken
Meaning
to keep someone down by harsh and unfair use of authority; to suppress
Example
The dictator oppressed the people for decades.
Der Diktator unterdrückte das Volk über Jahrzehnten.
C2 adjective /ˈɔːrəˌtʌnd/

orotund

volle und klare Stimme
Meaning
full, rich, and clear in sound; pompous in style
Example
The actor's orotund voice filled the theater.
Die orotunde Stimme des Schauspielers füllte das Theater.
C1 adjective /ˌaʊt ən ˈaʊt/

out-and-out

vollständig
Meaning
complete; absolute; used to emphasize something extreme
Example
The speech was an out-and-out lie.
Die Rede war eine vollständige Lüge.
A2 noun /ˈɔr.dər/

Order

Befehl; Reihenfolge
Meaning
a command or instruction; the arrangement of things following a particular sequence
Example
The teacher gave an order to sit down quietly.
Der Lehrer gab einen Befehl, sich ruhig hinzusetzen.
A1 conjunction /ɔːr/

or

oder
Meaning
used to link alternatives
Example
You can have tea or coffee.
Du kannst Tee oder Kaffee haben.
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.
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.
C1 adjective /ˈɒptɪk/

optic

optisch
Meaning
Relating to the eye or vision.
Example
The optic nerve carries signals from the eye to the brain.
Der optische Nerv überträgt Signale vom Auge zum Gehirn.
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 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 adjective /ˈoʊdiəs/

odious

abscheulich
Meaning
extremely unpleasant or repulsive
Example
The dictator was remembered for his odious crimes.
Der Diktator wurde für seine abscheulichen Verbrechen erinnert.
B2 verb əbˈzɜːrvd

observed

begehen
Meaning
To celebrate or keep a religious or other festival.
Example
The day is observed annually to raise awareness.
Der Tag wird jährlich begangen, um Bewusstsein zu schaffen.
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.
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.
A1 adjective /oʊld/

old

alt
Meaning
having lived for a long time; not new or young
Example
He still drives his old car.
Er fährt immer noch sein altes Auto.
B2 noun /ɑːks/

Ox

Ochse
Meaning
a large strong animal used for pulling heavy loads or plowing fields
Example
The farmer used an ox to plow the field.
Der Bauer benutzte einen Ochsen, um das Feld zu pflügen.
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.
C1 noun /ˈɔɪntmənt/

ointment

Salbe
Meaning
A smooth, oily substance applied to the skin for healing or soothing.
Example
The doctor prescribed an ointment for the burn on his arm.
Der Arzt verschrieb eine Salbe für die Verbrennung an seinem Arm.
A2 adverb; noun /ˌaʊtˈdɔːrz/

outdoors

draußen; im Freien
Meaning
outside a building; the natural environment outside
Example
We spent the whole afternoon outdoors enjoying the fresh air.
Wir verbrachten den ganzen Nachmittag draußen und genossen die frische Luft.
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.
C1 adjective /ˈɔːrθədɑːks/

orthodox

orthodox
Meaning
conforming to traditional beliefs or practices
Example
He comes from a very orthodox family.
Er stammt aus einer sehr orthodoxen Familie.
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.
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.
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.
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 verb /aʊtˈlæst/

outlast

länger überdauern als
Meaning
to continue longer than; to endure beyond someone or something else
Example
The old castle has outlasted many generations.
Das alte Schloss hat viele Generationen überdauert.
A1 noun/adjective/adverb /ˌaʊtˈsaɪd/

outside

draußen
Meaning
the external part or surface of something; beyond the boundary
Example
Children were playing outside in the yard.
Kinder spielten draußen im Garten.
B1 adverb /əˈrɪdʒɪnəli/

originally

ursprünglich
Meaning
in the beginning, at first
Example
Originally, she wanted to be a doctor.
Ursprünglich wollte sie Ärztin werden.
B1 adjective /ˌoʊvərˈsiːz/

overseas

ins Ausland
Meaning
in or to a foreign country across the sea
Example
He went overseas for higher education.
Er ging ins Ausland für höhere Bildung.
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.
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 /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 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.
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.
C1 verb /ˌoʊvərˈruːl/

overrule

aufheben
Meaning
to reject or disallow by exercising one's superior authority; to override a decision
Example
The judge overruled the objection from the defense attorney.
Der Richter hob den Einspruch des Verteidigers auf.
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.
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.
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.
A1 adverb /wʌns/

Once

einmal; irgendwann in der Vergangenheit
Meaning
one time only; at some time in the past; formerly
Example
I have been to Paris once in my life.
Ich war einmal in meinem Leben in Paris.
C1 noun /ˈɔːrθədɑːksi/

orthodoxy

Orthodoxie
Meaning
traditional or generally accepted beliefs and practices
Example
The religious leader defended the orthodoxy of the faith.
Der religiöse Führer verteidigte die Orthodoxie des Glaubens.
B1 adverb /ˈʌðərwaɪz/

Otherwise

anders; sonst
Meaning
in a different way; if not; or else; apart from that
Example
Study hard, otherwise you will fail the exam.
Lerne hart, sonst fällst du durch die Prüfung.
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.
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.
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.
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.
B2 noun /ˈaʊtˌskɜːrt/

outskirt

der Stadtrand
Meaning
the outer edge or border of a town or city
Example
They built a new factory on the outskirts of the city.
Sie bauten eine neue Fabrik am Stadtrand der Stadt.
C1 verb /aʊst/

oust

verdrängen
Meaning
To remove someone from a position or place of power or authority.
Example
The rebels ousted the dictator from power.
Die Rebellen verdrängten den Diktator von der Macht.
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.
C1 noun /oʊˈveɪʃən/

ovation

Beifall
Meaning
an enthusiastic show of approval, especially by clapping hands
Example
The actor received a standing ovation after his performance.
Der Schauspieler erhielt nach seiner Aufführung stehende Ovationen.
B2 noun/verb /ˌoʊvərˈlæp/

overlap

Überlappung
Meaning
To extend over and cover partly; an area where things coincide.
Example
The two meetings overlap by an hour.
Die beiden Besprechungen überlappen sich um eine Stunde.
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 verb /əˈpoʊz/

oppose

opponieren
Meaning
to disagree with or resist; to act against
Example
Many citizens oppose the new tax policy.
Viele Bürger opponieren gegen die neue Steuerpolitik.
B2 noun /ˈaʊtˌfɪt/

outfit

Outfit
Meaning
A set of clothes worn together, often for a particular occasion.
Example
She wore a beautiful outfit to the party.
Sie trug ein schönes Outfit zur Party.
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.
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.
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.
C1 noun /ˈɔr.ə.kəl/

Oracle

orakel
Meaning
a person regarded as a source of wise counsel; in ancient times, a priest or priestess acting as a medium
Example
The ancient Greeks consulted the oracle at Delphi.
Die alten Griechen konsultierten das Orakel in Delphi.
B2 noun /ɔːrˈɡæn.ɪk ˈfɑːr.mɪŋ/

organic farming

biologische Landwirtschaft
Meaning
Farming method that avoids synthetic chemicals and fertilizers, using natural methods instead.
Example
Organic farming improves soil health and reduces pollution.
Biologische Landwirtschaft verbessert die Gesundheit des Bodens und reduziert die Verschmutzung.
A1 adjective /ˈɔːr.ɪndʒ/

Orange

orange
Meaning
having a color between red and yellow like that of a ripe orange fruit
Example
The orange sunset painted the sky magnificently.
Der orange Sonnenuntergang malte den Himmel prächtig.
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.
A1 pronoun /aʊərz/

ours

unser
Meaning
belonging to or associated with us
Example
This victory is ours.
Dieser Sieg gehört uns.
B1 adjective /ˌoʊvərˈweɪt/

overweight

Übergewicht
Meaning
heavier than is considered healthy or normal
Example
The doctor advised him to lose weight as he was overweight.
Der Arzt riet ihm, Gewicht zu verlieren, da er übergewichtig war.
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.
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 /ˈɒlɪv brɑːntʃ/

olive-branch

Olivenzweig
Meaning
A symbol of peace or reconciliation; an offer to end conflict.
Example
He extended an olive-branch to his rival after years of hostility.
Er reichte seinem Rivalen nach Jahren der Feindseligkeit einen Olivenzweig.
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 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.
C1 adjective əʊˈpeɪk

opaque

undurchsichtig, undurchdringlich, schwer zu verstehen
Meaning
Not able to be seen through; not transparent; difficult to understand.
Example
The glass was too opaque to see through.
Das Glas war zu undurchsichtig, um hindurch zu sehen.
C1 adjective /aʊtˈmoʊdɪd/

outmoded

veraltet
Meaning
No longer in fashion or useful; outdated.
Example
That old computer is completely outmoded.
Dieser alte Computer ist völlig veraltet.
B1 noun /ˈɑb.stə.kəl/

Obstacle

Hindernis
Meaning
something that blocks or makes progress difficult; a barrier
Example
Bad weather was the main obstacle to our journey.
Schlechtes Wetter war das größte Hindernis für unsere Reise.
B2 noun /ɔːˈræŋ.ʊˌtæŋ/

Orang-Outang

Orang-Utang
Meaning
a large arboreal ape with long reddish hair, long arms, and hooked hands and feet, native to Borneo and Sumatra
Example
The orangutan swings gracefully through the forest canopy.
Der Orang-Utang schwingt anmutig durch das Blätterdach des Waldes.
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.
C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

überstimuliert
Meaning
Excessively excited or aroused, overwhelmed by too much stimulus.
Example
Overstimulated minds can lead to burnout and decreased productivity.
Überstimulierte Gedanken können zu Burnout und verringerter Produktivität führen.
B2 verb /ɒpt/

opt

wählen
Meaning
to choose or decide to do something instead of something else
Example
Many students opt to study abroad for better opportunities.
Viele Studenten entscheiden sich, im Ausland zu studieren, um bessere Möglichkeiten zu haben.
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.
B2 noun /ˈaʊtˌsɛt/

outset

Anfang
Meaning
the beginning or start of something
Example
From the outset, the project seemed ambitious but achievable.
Vom Anfang an schien das Projekt ehrgeizig, aber erreichbar.
C1 adjective /ˌəʊ.vərˈɑː.tʃɪŋ/

overarching

übergreifend, umfassend, allumfassend
Meaning
Comprehensive or all-embracing; forming an arch over something.
Example
The overarching theme of the book is human resilience.
Das übergeordnete Thema des Buches ist menschliche Resilienz.
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.
A2 noun /ˈʌn.jən/

Onion

Zwiebel
Meaning
a round vegetable with a strong taste and smell, made up of many layers
Example
I need to chop some onions for the curry recipe.
Ich muss einige Zwiebeln für das Curry-Rezept hacken.
C2 adjective /ˈoʊ.vɔɪd/

ovoid

eiförmig
Meaning
egg-shaped; resembling an oval or ellipse
Example
The artist painted an ovoid shape in the center of the canvas.
Der Künstler malte eine eiförmige Form in die Mitte der Leinwand.
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 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.
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 noun /oʊθ/

Oath

Eid
Meaning
a solemn promise or declaration; a sworn statement
Example
The doctor took an oath to help patients.
Der Arzt legte ein Eid ab, den Patienten zu helfen.
C1 adjective /ˈəʊnərəs/

onerous

beschwerlich
Meaning
involving a great deal of effort, difficulty, or burden
Example
Fulfilling the contract proved to be an onerous task for the company.
Die Erfüllung des Vertrags erwies sich als eine beschwerliche Aufgabe für das Unternehmen.
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.
C1 adjective /ˌoʊvərˈbɛrɪŋ/

overbearing

überheblich
Meaning
unpleasantly or arrogantly domineering
Example
His overbearing attitude made everyone uncomfortable.
Seine überhebliche Haltung hat alle unwohl gemacht.
C2 noun ˈɒpjʊləns

opulence

Opulenz
Meaning
Great wealth or luxuriousness.
Example
The opulence of the mansion was evident in its ornate furnishings.
Die Opulenz des Herrenhauses war in seiner verzierenden Einrichtung offensichtlich.
C2 adjective /ˈɑːbdjʊrət/

obdurate

unbeugsam
Meaning
Stubbornly refusing to change one's opinion or course of action.
Example
He remained obdurate despite everyone's pleas.
Er blieb unbeugsam trotz aller Bitten.
C2 verb /ˈɑːbvieɪt/

obviate

beseitigen
Meaning
To remove a need or difficulty; to prevent or avoid something.
Example
This new system obviates the need for manual data entry.
Dieses neue System beseitigt die Notwendigkeit einer manuellen Dateneingabe.
C2 noun /ˈaʊtˌrɪɡər/

outrigger

Stabilisierungsstruktur
Meaning
a projecting structure on a boat, used for stability, or a boat fitted with such support
Example
The fisherman paddled his outrigger canoe across the lagoon.
Der Fischer paddelte sein Outrigger-Kanu über die Lagune.
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.
A1 pronoun /aʊər/

our

unser
Meaning
belonging to or associated with the speaker and one or more other people
Example
This is our house.
Dies ist unser Haus.
B2 noun /oʊk/

oak

Eiche
Meaning
a large tree that produces acorns and has strong, hard wood
Example
The old oak tree provided shade for the entire yard.
Der alte Eichenbaum spendete Schatten für den ganzen Garten.
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.
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.
B2 verb /ˈɒkjʊpaɪ/

occupy

besetzen
Meaning
to take up space or time; to live or work in a place
Example
The new family will occupy the house next month.
Die neue Familie wird das Haus naechsten Monat beziehen.
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 /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.
C1 noun /ˌɑːpərˈtuːnɪst/

opportunist

Opportunist
Meaning
A person who takes advantage of situations for personal gain, often disregarding principles.
Example
He is seen as an opportunist who always puts his interests first.
Er wird als Opportunist gesehen, der immer seine eigenen Interessen an erste Stelle setzt.
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.
B2 verb /ˌoʊvərˈwɛlm/

overwhelm

überwältigen
Meaning
to overpower someone emotionally or physically; to be too much to handle
Example
She was overwhelmed with gratitude after receiving the help.
Sie war überwältigt von Dankbarkeit, nachdem sie die Hilfe erhalten hatte.