outlive
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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.
C1 adjective /əbˈtjuːs/

Obtuse

dumm; stumpf; langsam zu verstehen
Meaning
annoyingly insensitive or slow to understand; lacking in intelligence or perception
Example
He was being deliberately obtuse about the instructions.
Er war absichtlich obtus bezüglich der Anweisungen.
B2 noun /ˈaʊt.breɪk/

Out-break

Ausbruch
Meaning
a sudden occurrence or eruption of something, especially disease or violence
Example
The outbreak of flu affected many students in the school.
Der Ausbruch der Grippe hat viele Schüler in der Schule betroffen.
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.
B1 noun ˈɒk.sɪ.dʒən

oxygen

Sauerstoff. Ein farb- und geruchloses Gas, das für das Leben unerlässlich ist.
Meaning
A colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.
Example
Oxygen is vital for life.
Sauerstoff ist für das Leben wichtig.
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.
C2 adjective /ˈɒf.biːt/

offbeat

ungewöhnlich
Meaning
Unusual, unconventional, or different from the norm.
Example
She has a very offbeat sense of humor.
Sie hat einen sehr ungewöhnlichen Sinn für Humor.
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.
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.
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.
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.
C2 verb /ˈɒsɪfaɪ/

ossify

verknöchern
Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
Mit dem Alter neigen einige Gewebe dazu, zu osifizieren.
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.
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.
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 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.
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.
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.
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.
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.
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 /ˈɒbsɪkwi/

obsequy

Begräbnisritus
Meaning
A funeral rite, usually used in plural form obsequies.
Example
The village gathered for the obsequy of their beloved teacher.
Das Dorf versammelte sich für das Begräbnisritus ihres geliebten Lehrers.
B2 verb /ˌoʊvərˈiːt/

overeat

Glück
Meaning
To eat more food than the body needs.
Example
She tends to overeat when she is stressed.
Sie konnte ihr Glück nicht verbergen, als sie den Preis erhielt.
B2 adjective ɔːrˈɡæn.ɪk

organic

biologisch
Meaning
Produced or involving production without the use of chemical fertilizers, pesticides, or other artificial agents.
Example
Organic farming improves soil health and reduces pollution.
Ökologischer Landbau verbessert die Gesundheit des Bodens und reduziert die Verschmutzung.
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 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.
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 /ˈaʊtriːtʃ/

outreach

Erweiterung der Hilfe
Meaning
The act of providing services or support to people who might not otherwise have access to them.
Example
The charity launched a new outreach program for the homeless.
Die Wohltätigkeitsorganisation startete ein neues Programm zur Erweiterung der Hilfe für Obdachlose.
C1 adjective /ˈɑp.ər.ə.tɪv/

Operative

aktiv; in Kraft; funktionierend; betriebsbereit;
Meaning
Functioning; in effect; working; active;
Example
The new safety protocols became operative immediately after the accident.
Die neuen Sicherheitsprotokolle wurden unmittelbar nach dem Unfall betriebsbereit.
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.
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.
C1 noun /ˈoʊ.mən/

Omen

Vorzeichen für zukünftiges Glück oder Unglück
Meaning
an event regarded as a sign of future good or bad luck
Example
Many people consider a black cat crossing your path a bad omen.
Viele Menschen betrachten eine schwarze Katze, die ihren Weg kreuzt, als schlechtes Vorzeichen.
C1 adjective əˈblɪv.i.əs

oblivious

unbewusst
Meaning
Being completely unaware of surrounding events.
Example
He was oblivious to the noise around him while reading.
Er war beim Lesen völlig unbewusst von dem Lärm um ihn herum.
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.
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 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.
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.
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 /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 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 /ˈɒfʃuːt/

offshoot

Abspaltung
Meaning
A branch or result that develops from something larger or more important.
Example
The startup was an offshoot of a major tech company.
Das Startup war eine Abspaltung eines großen Tech-Unternehmens.
A2 adjective /ˈɑp.ə.zɪt/

Opposite

entgegengesetzt; völlig unterschiedlich; einander zugewandt; umgekehrt;
Meaning
Contrary; completely different; facing each other; reverse;
Example
They have opposite views on politics but remain good friends.
Sie haben gegensätzliche Ansichten zur Politik, bleiben aber gute Freunde.
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.
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.
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.
B2 noun /wʌn θɜːd/

one-third

ein Drittel
Meaning
one part of something that is divided into three equal parts
Example
One-third of the class was absent today.
Ein Drittel der Klasse war heute abwesend.
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.
B1 verb /ˈɒpəreɪtɪŋ/

operating

operierend
Meaning
to control or manage the functioning of something
Example
The company has been operating in this market for five years.
Das Unternehmen arbeitet seit fünf Jahren in diesem Markt.
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.
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.
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 /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.
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.
C1 verb /əˈfɪʃieɪt/

officiate

leiten
Meaning
To perform official duties, especially in a ceremony or as a referee.
Example
The priest will officiate the wedding ceremony.
Der Priester wird die Hochzeitszeremonie leiten.
A1 conjunction /ɔːr/

or

oder
Meaning
used to link alternatives
Example
You can have tea or coffee.
Du kannst Tee oder Kaffee haben.
C2 noun /ˈɑːbəlɪsk/

obelisk

obelisk
Meaning
A tall, four-sided, narrow tapering monument with a pyramid-shaped top.
Example
The ancient Egyptians built obelisks to honor their gods.
Die alten Ägypter errichteten Obelisken, um ihre Götter zu ehren.
B2 noun /ˈaʊt.saɪ.dər/

Out-sider

Außenseiter
Meaning
a person who does not belong to a particular group; someone not accepted by a group
Example
As an outsider, he found it difficult to understand their traditions.
Als Außenseiter fand er es schwierig, ihre Traditionen zu verstehen.
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.
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.
A1 pronoun /aʊərz/

ours

unser
Meaning
belonging to or associated with us
Example
This victory is ours.
Dieser Sieg gehört uns.
B2 noun /ˈɒs.trɪtʃ/

Ostrich

Strauss
Meaning
a large flightless bird native to Africa with long legs and neck
Example
The ostrich is the world's largest bird.
Der Strauss ist der größte Vogel der Welt.
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.
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.
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 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 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.
B2 verb /ˌoʊvərˈteɪk/

overtake

überholen
Meaning
to catch up with and pass someone or something; to surpass
Example
The runner managed to overtake his competitor in the final lap.
Der Läufer konnte seinen Konkurrenten in der letzten Runde überholen.
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 verb /oʊ/

owe

schulden
Meaning
to be under obligation to pay or repay; to be indebted
Example
I owe my success to my parents' support.
Ich schulde meinen Erfolg der Unterstützung meiner Eltern.
A2 adjective /ˈɔː.dɪ.nər.i/

Ordinary

gewöhnlich; normal; nicht besonders
Meaning
normal; usual; not special
Example
It was just an ordinary day at the office.
Es war einfach ein gewöhnlicher Tag im Büro.
B2 noun /ˈɔːrnəmənt/

ornament

Schmuck
Meaning
A decorative object that adds beauty to something.
Example
The Christmas tree was decorated with colorful ornaments.
Der Weihnachtsbaum war mit buntem Schmuck geschmückt.
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.
B2 adverb /ˈoʊpənli/

Openly

offen; öffentlich
Meaning
in a frank and honest way; without concealment; publicly
Example
She spoke openly about her struggles with mental health.
Sie sprach offen über ihre Kämpfe mit der psychischen Gesundheit.
B2 adverb /ˌoʊvərˈnaɪt/

Overnight

über Nacht; plötzlich; sehr schnell
Meaning
during the night; suddenly; very quickly
Example
The city was transformed overnight.
Die Stadt wurde über Nacht verwandelt.
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.
C2 verb /əbˈtruːd/

obtrude

aufdrängen
Meaning
to force oneself or one's ideas into a situation uninvited or inappropriately
Example
He didn’t want to obtrude into their private conversation.
Er wollte nicht in ihr privates Gespräch aufdrängen.
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 noun ˈaʊt.sɔːr.sɪŋ

outsourcing

Auslagerung
Meaning
The practice of having certain job functions done outside a company instead of having an in-house department or employee handle them.
Example
Many companies use outsourcing to reduce labor costs.
Viele Unternehmen nutzen Outsourcing, um die Arbeitskosten zu senken.
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.
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.
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.
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 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.
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.
B2 adjective /ˈɔː.də.li/

Orderly

ordentlich; systematisch; friedlich
Meaning
well-organized; systematic; peaceful
Example
Please keep your desk orderly and clean.
Bitte halten Sie Ihren Schreibtisch ordentlich und sauber.
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.
A1 interjection /oʊ/

oh

Oh
Meaning
used to express surprise, realization, or understanding
Example
Oh, I didn't know you were here!
Oh, ich wusste nicht, dass du hier bist!
C2 noun /əbˈstrʌkʃənɪst/

obstructionist

Verhinderer
Meaning
a person who deliberately delays or prevents progress by being uncooperative or oppositional
Example
The obstructionist in the committee kept delaying the decision-making process.
Der Verhinderer im Ausschuss verzögerte weiterhin den Entscheidungsfindungsprozess.
B2 noun /ˈaʊtlʊk/

outlook

Aussicht, Prognose
Meaning
a person's general attitude or view; a forecast or prospect
Example
The economic outlook for the year is positive.
Der wirtschaftliche Ausblick für das Jahr ist positiv.
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.
C2 adjective /əˈfɪʃəs/

officious

aufdringlich
Meaning
Excessively eager to offer unwanted help or advice; meddlesome.
Example
The officious guard kept interrupting the visitors with unnecessary instructions.
Der aufdringliche Wächter unterbrach die Besucher mit unnötigen Anweisungen.
B2 noun /ˈaʊtbɜːrst/

outburst

plötzlicher Ausbruch von Wut oder Emotion
Meaning
a sudden release of strong emotion or activity
Example
She had an angry outburst during the meeting.
Sie hatte während des Treffens einen wütenden Ausbruch.
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.
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 noun ˌɒp.tɪ.maɪˈzeɪ.ʃən

optimization

Optimierung
Meaning
Improving processes to increase performance and efficiency.
Example
SEO optimization helps websites rank higher on search engines.
SEO-Optimierung hilft Websites, in Suchmaschinen höher zu ranken.
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.
C2 adjective /ˈɔːrnəri/

ornery

grimmig
Meaning
bad-tempered and combative; stubborn
Example
The ornery old man refused to leave his chair.
Der grimmige alte Mann weigerte sich, seinen Stuhl zu verlassen.
C1 adverb /ˈɒp.tɪ.məl.i/

optimally

optimal
Meaning
In the most effective or efficient way possible.
Example
Tasks should be allocated optimally for maximum output.
Aufgaben sollten optimal für maximale Ergebnisse verteilt werden.
C2 verb /ˌoʊvərˈstraɪd/

overstride

mit großen Schritten überqueren
Meaning
To stride over something; to step across with long steps.
Example
He managed to overstride the narrow stream with ease.
Er schaffte es, den engen Bach mit Leichtigkeit zu überqueren.
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 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.
C2 noun /ˈoʊpiət/

opiate

Opiat
Meaning
a drug containing opium or its derivatives, used to relieve pain or cause sleep
Example
The doctor prescribed an opiate to relieve the patient's pain.
Der Arzt verschrieb dem Patienten ein Opiat, um die Schmerzen zu lindern.
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.
C2 noun /ˈɒksɪdənt/

occident

Okzident
Meaning
The countries of the West, especially Europe and America.
Example
The Occident has a long history of philosophical thought.
Der Okzident hat eine lange Geschichte der philosophischen Gedanken.
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 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.
B2 noun /ˈɔr.fən/

Orphan

Waisenkind
Meaning
a child whose parents are dead; someone without protective support
Example
The orphan was adopted by a loving family.
Das Waisenkind wurde von einer liebevollen Familie adoptiert.
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.
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 /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.
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.
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 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.
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.
C2 adjective /əˈprəʊ.bri.əs/

opprobrious

verachtend
Meaning
Expressing strong criticism or scorn.
Example
He made opprobrious remarks about his opponent.
Er machte verächtliche Bemerkungen über seinen Gegner.
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.
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 noun /əˈpreʃ.ən/

Oppression

Unterdrückung; Misshandlung; Tyrannei;
Meaning
cruel or unjust treatment or exercise of authority; the state of being subject to harsh treatment
Example
The people fought against political oppression.
Die Menschen kämpften gegen politische Unterdrückung.
C2 adjective /əˈrækjələr/

oracular

orakular
Meaning
Resembling an oracle; giving wise, mysterious, or prophetic statements
Example
Her oracular words left the audience deep in thought.
Ihre orakularen Worte ließen das Publikum tief nachdenken.
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.