oversee
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B2 verb /ˌoʊvərˈsiː/

oversee

наблюдать
Meaning
to supervise or watch over something; to manage and direct
Example
The manager will oversee the entire construction project.
Менеджер будет следить за всем строительным проектом.
C1 adjective /əˈblɪɡ.ə.tɔː.ri/

obligatory

обязательный
Meaning
Required by a legal, moral, or other rule; compulsory.
Example
Wearing a seatbelt is obligatory in most countries.
Ношение ремня безопасности обязательно во многих странах.
C1 noun /ˈaʊtriːtʃ/

outreach

расширение помощи
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.
Благотворительная организация запустила новую программу расширения помощи для бездомных.
C1 verb /ˈɒp.tɪ.maɪz/

optimize

оптимизировать
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.
Компания работает над оптимизацией своей цепочки поставок.
C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

Meaning
Excessively excited or aroused, overwhelmed by too much stimulus.
Example
Overstimulated minds can lead to burnout and decreased productivity.
B2 adjective ˌɒp.ərˈeɪ.ʃən.əl

operational

оперативный
Meaning
In working order; ready for use.
Example
The space project will be operational by 2025.
Космический проект будет операционным к 2025 году.
B1 noun ˌɔː.ɡən.aɪˈzeɪ.ʃənz

organizations

организации
Meaning
Organized groups of people with a particular purpose
Example
Organizations play a key role in policymaking.
Организации играют ключевую роль в формировании политики.
B2 adverb /ˈəʊvəli/

overly

чрезмерно
Meaning
to an excessive degree or extent
Example
She was overly concerned about the results.
Она была чрезмерно обеспокоена результатами.
C2 verb /ˈɔːreɪt/

orate

ораторствовать
Meaning
To speak in a formal, often pompous manner
Example
He began to orate at the ceremony.
Он начал ораторствовать на церемонии.
C1 adjective /əˈkʌlt/

occult

оккультный
Meaning
Relating to mysterious, supernatural, or magical powers and practices.
Example
She had always been fascinated by the occult and its hidden knowledge.
Она всегда была очарована оккультизмом и его скрытыми знаниями.
C2 noun /ˈɔːrdnəns/

ordnance

вооружение
Meaning
Military supplies including weapons, ammunition, and combat equipment.
Example
The army stored ordnance in a secure facility outside the city.
Армия хранила вооружение в безопасном месте за пределами города.
C2 adjective /ɑːlˈfæktəri/

olfactory

обонятельный
Meaning
Relating to the sense of smell.
Example
The perfume activated her olfactory nerves immediately.
Парфюм сразу активировал её обонятельные нервы.
B2 verb /əˈpoʊz/

oppose

опротестовать
Meaning
to disagree with or resist; to act against
Example
Many citizens oppose the new tax policy.
Многие граждане против новой налоговой политики.
B2 noun /ˈaʊtlet/

outlet

выход
Meaning
a means by which something is released, expressed, or distributed
Example
Art is a great outlet for emotions.
Искусство — отличный выход для эмоций.
C1 noun /oʊθ/

Oath

клятва
Meaning
a solemn promise or declaration; a sworn statement
Example
The doctor took an oath to help patients.
Доктор дал клятву помогать пациентам.
C1 verb /aʊtˈlæst/

outlast

выжить дольше, чем
Meaning
to continue longer than; to endure beyond someone or something else
Example
The old castle has outlasted many generations.
Старый замок пережил многие поколения.
A1 adjective /əʊˈkeɪ/

okay

хорошо
Meaning
used to express agreement or acceptance
Example
It's okay to leave early today.
Хорошо, если уйти раньше сегодня.
B2 noun /ˈɔːrnəmənt/

ornament

украшение
Meaning
A decorative object that adds beauty to something.
Example
The Christmas tree was decorated with colorful ornaments.
Рождественская елка была украшена цветными украшениями.
C1 noun /əbˈstrʌkʃən/

obstruction

препятствие
Meaning
Something that blocks or gets in the way; the action of obstructing.
Example
There was an obstruction on the railway track.
На железной дороге было препятствие.
C1 adjective ˈɒk.sɪ.də.tɪv

oxidative

Связанный с окислением
Meaning
Related to or caused by oxidation, especially cellular damage from free radicals.
Example
Excess stress can lead to oxidative damage in cells.
Чрезмерный стресс может вызвать окислительный ущерб в клетках.
C1 verb /aʊtˈwɪt/

outwit

перехитрить
Meaning
to defeat or gain an advantage over someone by being more clever or cunning
Example
The fox managed to outwit the hunters.
Лиса смогла перехитрить охотников.
C1 noun /ˈɔɪntmənt/

ointment

мазь
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.
Доктор прописал мазь для ожога на его руке.
C2 noun /əˈblɪkwɪti/

obliquity

кривизна
Meaning
Deviation from moral or usual conduct; indirectness or lack of straightforwardness.
Example
The politician was criticized for the obliquity of his answers.
Политика был критикован за кривизну его ответов.
C2 noun /ˌɒstɛnˈteɪʃən/

ostentation

показуха
Meaning
excessive display of wealth or knowledge intended to attract admiration or envy
Example
The billionaire’s party was full of ostentation and luxury.
Вечеринка миллиардера была полна показухи и роскоши.
B2 noun /əˈpoʊ.nənt/

Opponent

оппонент; соперник
Meaning
a person who disagrees with or resists a proposal or practice; someone who competes against another
Example
The chess player defeated his strongest opponent.
Шахматист победил своего самого сильного оппонента.
C1 noun /əˈfen.dər/

Offender

правонарушитель; нарушитель закона
Meaning
a person who commits an illegal act; someone who breaks the law
Example
The young offender was sentenced to community service.
Молодой правонарушитель был приговорен к общественным работам.
B2 noun /ˈɒt.ər/

Otter

выдра
Meaning
a mammal with webbed feet that lives near water and feeds on fish
Example
The playful otter swam gracefully in the river.
Игривая выдра плавала грациозно в реке.
B2 noun /ˈɒkjʊpənt/

occupant

житель
Meaning
A person who resides in or is present in a house, vehicle, seat, or place.
Example
The car had three occupants at the time of the accident.
В автомобиле было три пассажира на момент аварии.
A1 adjective/adverb /ˈoʊnli/

only

только
Meaning
without others; solely
Example
He is the only person who knows the secret.
Он единственный человек, который знает секрет.
C2 noun /ˌɔːrdɪˈneɪʃən/

ordination

посвящение
Meaning
The ceremony of conferring holy orders or official religious authority.
Example
The church held a special service for the ordination of new priests.
Церковь провела специальную службу для посвящения новых священников.
C1 noun /ˌəʊvərɪksˌplɔɪˈteɪʃən/

overexploitation

перерасход
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.
Перерасход природных ресурсов приводит к экологическому ухудшению.
C1 noun ˌɒb.səˈlɛs.əns

obsolescence

устаревание
Meaning
The process of becoming obsolete or outdated and no longer used.
Example
The rapid advancement of technology leads to the obsolescence of old devices.
Быстрое развитие технологий приводит к устареванию старых устройств.
C1 noun /ˈoʊvərˌtʊr/

overture

уведо́мление / предложение
Meaning
An introduction to something more substantial; a proposal or preliminary action.
Example
The peace overture was welcomed by both nations.
Мирное предложение было встречено обеими нациями.
C2 noun /ˈɑːbəlɪsk/

obelisk

обелиск
Meaning
A tall, four-sided, narrow tapering monument with a pyramid-shaped top.
Example
The ancient Egyptians built obelisks to honor their gods.
Древние египтяне строили обелиски, чтобы почтить своих богов.
C1 adjective /ˌɒmnɪˈprezənt/

omnipresent

вездесущий
Meaning
(of God) present everywhere at the same time.
Example
Social media has become an omnipresent force in modern society.
Социальные сети стали вездесущей силой в современном обществе.
C1 noun /ˈoʊ.mən/

Omen

предвестие будущего удачи или неудачи
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.
Многие люди считают, что черная кошка, пересекающая ваш путь, - это плохой знак.
A1 adverb /wʌns/

Once

один раз; когда-то в прошлом
Meaning
one time only; at some time in the past; formerly
Example
I have been to Paris once in my life.
Я был в Париже один раз в своей жизни.
C2 adjective /ɒmˈnɪʃ.ənt/

Omniscient

всезнающий
Meaning
having complete knowledge; all-knowing
Example
The narrator in the novel appears to be omniscient, knowing every character's thoughts.
Рассказчик в романе кажется всезнающим, зная все мысли персонажей.
C1 verb /aʊst/

oust

отстранить
Meaning
To remove someone from a position or place of power or authority.
Example
The rebels ousted the dictator from power.
Повстанцы отстранили диктатора от власти.
B2 verb /əbˈteɪn/

obtain

получить
Meaning
to get or acquire something
Example
You need to obtain a visa before traveling abroad.
Вам нужно получить визу перед тем, как отправиться за границу.
B1 noun ˌɔː.ɡən.aɪˈzeɪ.ʃən

organization

организация
Meaning
An organized group of people with a particular purpose, such as a business or government department.
Example
The organization was officially inaugurated in 2024.
Организация была официально открыта в 2024 году.
C1 verb /ˌaʊtˈweɪ/

outweigh

быть более важным
Meaning
To be more important, valuable, or significant than something else.
Example
The benefits of the new policy outweigh the risks.
Преимущества новой политики перевешивают риски.
A2 adjective /ˈɑp.ə.zɪt/

Opposite

противоположный; полностью разные; лицом к лицу; обратный;
Meaning
Contrary; completely different; facing each other; reverse;
Example
They have opposite views on politics but remain good friends.
У них противоположные взгляды на политику, но они остаются хорошими друзьями.
C2 noun /ˈɔɪl.mən/

Oilman

нефтяник
Meaning
a person who works in the oil industry; someone who sells oil or petroleum products
Example
The oilman discovered a new oil field in the desert.
Нефтяник обнаружил новое нефтяное месторождение в пустыне.
B1 noun ˈɒk.sɪ.dʒən

oxygen

кислород. Бесцветный, без запаха газ, необходимый для жизни.
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.
Кислород жизненно важен для жизни.
B2 noun /ˌoʊ.vɚˈkraʊ.dɪŋ/

overcrowding

чрезмерное скопление людей
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.
Метро страдает от серьезного переполнения в часы пик.
B2 noun /ɒdz/

odds

вероятность
Meaning
the likelihood or probability of something happening; chances for or against something
Example
The odds of winning the lottery are very low.
Шансы выиграть в лотерею очень низки.
C1 verb /əbˈsɛs/

obsess

одержимость
Meaning
To preoccupy or fill the mind of someone continually and to an excessive degree.
Example
She tends to obsess over small details.
Она склонна зацикливаться на мелочах.
C1 adjective /əbˈnɒkʃəs/

Obnoxious

невыносимый
Meaning
Extremely unpleasant, offensive, or annoying.
Example
The obnoxious behavior of the guest ruined the party.
Невыносимое поведение гостя испортило вечеринку.
B1 noun /ˈɔr.ə.ʒɪn/

Origin

происхождение
Meaning
the point or place where something begins, arises, or is derived; the source
Example
Scientists are studying the origin of the universe.
Учёные изучают происхождение вселенной.
A1 preposition /ʌv/

of

от
Meaning
expressing the relationship between a part and a whole
Example
The book is on the table, in front of the window.
Книга на столе, перед окном.
C1 adjective /ˌaʊtˈspoʊkən/

Outspoken

откровенный
Meaning
frank; speaking directly
Example
She is known for being outspoken about social issues.
Она известна своей откровенностью по социальным вопросам.
B1 verb /ˈɔːrɡənaɪz/

organize

организовать
Meaning
to arrange systematically; to plan and coordinate
Example
She organized a surprise party for her friend.
Она организовала сюрприз-вечеринку для своей подруги.
B2 noun /ɔːrˈɡæn.ɪk ˈfɑːr.mɪŋ/

organic farming

органическое сельское хозяйство
Meaning
Farming method that avoids synthetic chemicals and fertilizers, using natural methods instead.
Example
Organic farming improves soil health and reduces pollution.
Органическое земледелие улучшает здоровье почвы и снижает загрязнение.
A2 noun /əˈlɪmpɪks/

olympics

Олимпийские игры
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.
Олимпийские игры собирают спортсменов со всего мира.
B1 adjective, adverb /ˈoʊvərɔːl/

overall

в целом
Meaning
in general or as a whole
Example
Overall, the project has been successful.
В целом, проект был успешным.
C1 adverb /ˈaʊtwədli/

Outwardly

внешне; на вид;
Meaning
on the surface; externally; in appearance
Example
Outwardly, he seemed calm, but inside he was nervous.
Внешне он казался спокойным, но внутри он был нервным.
B2 noun /wʌn θɜːd/

one-third

одна треть
Meaning
one part of something that is divided into three equal parts
Example
One-third of the class was absent today.
Одна треть класса была сегодня отсутствует.
C2 noun /ˈɒrɪz(ə)n/

orison

молитва
Meaning
a prayer, especially a devout or formal one
Example
He whispered a quiet orison before going to sleep.
Он шептал тихую молитву перед сном.
B2 noun /ˈaʊtskɜːrts/

outskirts

периферия города
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.
Они переехали на окраины города, чтобы жить спокойнее.
C2 noun /ˈɒksɪdənt/

occident

Запад
Meaning
The countries of the West, especially Europe and America.
Example
The Occident has a long history of philosophical thought.
Запад имеет долгую историю философской мысли.
B1 adjective /əˈrɪdʒ.ɪ.nəl/

Original

оригинальный; первичный; подлинный
Meaning
first; fundamental; primary; authentic
Example
This is the original document, not a copy.
Это оригинальный документ, а не копия.
B2 adjective; verb (past participle) /ˈɒkjʊpaɪd/

occupied

занятый; оккупированный
Meaning
being in use or taken; filled or lived in; controlled or held by force
Example
The room is occupied, so please wait outside.
Комната занята, пожалуйста, подождите снаружи.
C2 noun /oʊˈbleɪʃən/

oblation

жертвоприношение
Meaning
a religious offering, especially of bread or wine to God
Example
The priest placed the oblation on the altar during the ceremony.
Священник положил жертвоприношение на алтарь во время церемонии.
C1 adjective /əbˈtjuːs/

Obtuse

тупой; медленно понимающий; нечувствительный
Meaning
annoyingly insensitive or slow to understand; lacking in intelligence or perception
Example
He was being deliberately obtuse about the instructions.
Он преднамеренно был обтусен в отношении инструкций.
C2 verb ˈɑːb.fə.skeɪt

obfuscate

затемнять, запутывать, скрывать
Meaning
Render obscure, unclear, or unintelligible.
Example
Politicians often obfuscate facts to mislead people.
Политики часто затемняют факты, чтобы ввести людей в заблуждение.
C1 noun /ˈɑn.set/

Onset

начало; старт
Meaning
the beginning or early stages of something; the start of a medical condition
Example
The onset of winter brought heavy snowfall.
Начало зимы принесло сильный снегопад.
A2 noun /ˈoʊpənɪŋ/

opening

открытие
Meaning
an act or instance of beginning something
Example
The opening of the new store was a huge success.
Открытие нового магазина стало большим успехом.
C2 adjective /əbˈtruːsɪv/

obtrusive

назойливый
Meaning
noticeable in an unpleasant or unwelcome way; intrusive
Example
The advertisement was so obtrusive that it ruined the user’s experience.
Реклама была настолько назойливой, что испортила опыт пользователя.
B2 noun /ɒpˈtɪʃən/

optician

оптик
Meaning
A person who makes or sells glasses and contact lenses.
Example
The optician adjusted my new glasses to fit better.
Оптик подстроил мои новые очки так, чтобы они сидели лучше.
C1 noun /ˈɒf.sprɪŋ/

offspring

потомство
Meaning
a person's child or children; an animal's young
Example
The bird carefully fed its offspring.
Птица осторожно кормит свое потомство.
C2 noun /ɔːˈreɪʃən/

oration

речь
Meaning
A formal speech, especially one given on a ceremonial occasion
Example
The president delivered an inspiring oration.
Президент произнес вдохновенную речь.
B1 noun /ˌɒp.əˈtjuː.nə.ti/

opportunity

возможность
Meaning
A favorable chance or set of circumstances that makes it possible to do something.
Example
She seized the opportunity to study abroad.
Она воспользовалась возможностью учиться за границей.
B2 noun /ˌaʊtˈsaɪdə(r)/

outsider

аутсайдер
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.
Будучи новым студентом, она часто чувствовала себя аутсайдером в школе.
B1 verb /ˈɒpəreɪtɪŋ/

operating

оперирующий
Meaning
to control or manage the functioning of something
Example
The company has been operating in this market for five years.
Компания работает на этом рынке уже пять лет.
C1 noun /ˌɒbstəˈtrɪʃən/

obstetrician

акушер-гинеколог
Meaning
A doctor specializing in pregnancy, childbirth, and women's reproductive health.
Example
The obstetrician monitored the mother’s health throughout the pregnancy.
Акушер-гинеколог следил за здоровьем матери на протяжении всей беременности.
B2 noun /ˈoʊ.dər/

Odour

запах
Meaning
a distinctive smell, especially an unpleasant one
Example
The odour of fresh bread filled the kitchen.
Запах свежего хлеба наполнил кухню.
C2 noun (plural) /ˈɔːrdʒiːz/

orgies

оргии
Meaning
Wild gatherings involving excessive indulgence in food, drink, or sexual activity.
Example
The ancient Romans were infamous for their lavish feasts and orgies.
Древние римляне были печально известны своими роскошными пиршествами и оргиями.
A2 noun /ˈɔr.dər/

Order

приказ; порядок
Meaning
a command or instruction; the arrangement of things following a particular sequence
Example
The teacher gave an order to sit down quietly.
Учитель дал команду сесть спокойно.
C1 verb /ˌaʊtˈstrɪp/

outstrip

опережать
Meaning
To go faster or do better than someone or something; to surpass.
Example
The company outstripped its competitors in sales last year.
Компания превзошла своих конкурентов по продажам в прошлом году.
C2 noun /oʊliˈændər/

Oleander

олеандр
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.
Прекрасные цветы олеандра расцвели в саду, несмотря на их ядовитую природу.
B2 noun/verb /ˈaʊtreɪdʒ/

outrage

возмущение
Meaning
A strong feeling of anger and shock; to arouse anger or shock.
Example
The unfair decision caused public outrage.
Несправедливое решение вызвало общественное возмущение.
B2 noun ˈɔː.bɪt

orbit

орбита
Meaning
The curved path of a celestial object around a star, planet, or moon.
Example
The satellite maintains its orbit around Earth.
Спутник поддерживает свою орбиту вокруг Земли.
C2 adjective /ˈɑːbdjʊrət/

obdurate

упертый
Meaning
Stubbornly refusing to change one's opinion or course of action.
Example
He remained obdurate despite everyone's pleas.
Он остался упертым, несмотря на просьбы всех.
C2 noun /ɔːrˈθɑːɡrəfi/

orthography

орфография
Meaning
The conventional spelling system of a language.
Example
English orthography can be confusing for learners.
Английская орфография может быть запутанной для учащихся.
A1 interjection /oʊ/

oh

Ох
Meaning
used to express surprise, realization, or understanding
Example
Oh, I didn't know you were here!
Ох, я не знал, что ты здесь!
B1 verb /əˈkɜːr/

occur

случаться
Meaning
to happen or take place; to be found or present
Example
The accident occurred at the intersection during rush hour.
Авария произошла на перекрестке в час пик.
C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

ортогональный
Meaning
at right angles; independent or unrelated
Example
In mathematics, two vectors are orthogonal if their dot product is zero.
В математике два вектора ортогональны, если их скалярное произведение равно нулю.
C2 adjective /ˈɒf.biːt/

offbeat

необычный
Meaning
Unusual, unconventional, or different from the norm.
Example
She has a very offbeat sense of humor.
У неё очень необычное чувство юмора.
C1 noun /əbˈdʒɛktər/

objector

опротестующий
Meaning
a person who expresses opposition or disapproval to something
Example
The objector raised his concerns during the town meeting.
Опротестующий выразил свои опасения во время собрания городского совета.
B2 noun ˈəʊnəʃɪp

ownership

владение
Meaning
The act, state, or right of possessing something; legal title to something.
Example
Ownership of resources was crucial.
Владение ресурсами было решающим.
B2 noun, verb /ˈaʊtlɔː/

outlaw

изгой
Meaning
as a noun: a person who breaks the law and lives outside its protection; as a verb: to make something illegal
Example
The government decided to outlaw the harmful practice.
Правительство решило запретить вредную практику.
C1 adjective /ˌoʊvərˈbɛrɪŋ/

overbearing

властный
Meaning
unpleasantly or arrogantly domineering
Example
His overbearing attitude made everyone uncomfortable.
Его властное поведение заставило всех чувствовать себя неловко.
C2 noun /ˈaʊtˌrɪɡər/

outrigger

стабилизирующая структура
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.
Рыбак греб своим каноэ с аутригером через лагуну.
C2 noun /əbˈstɛtrɪks/

obstetrics

акушерство
Meaning
The branch of medicine dealing with childbirth and care of women giving birth.
Example
She is studying obstetrics to become a specialist in childbirth.
Она учится на акушерку, чтобы стать специалистом по родам.
B2 adjective /ˈaʊtˌɡoʊɪŋ/

outgoing

общительный
Meaning
Friendly and sociable; inclined to mix with others.
Example
He is an outgoing person who loves meeting new people.
Он общительный человек, который любит встречаться с новыми людьми.
C1 verb /ˈoʊvərˌhɔːl/

overhaul

полная переработка
Meaning
to examine thoroughly and repair or improve something that is worn or ineffective
Example
The company decided to overhaul its outdated computer system.
Компания решила провести полную переработку своей устаревшей компьютерной системы.
B2 verb /ˌoʊvərˈkʌm/

overcome

преодолеть
Meaning
To succeed in dealing with a problem or difficulty.
Example
You can overcome procrastination with planning.
Вы можете преодолеть прокрастинацию с помощью планирования.
C2 verb /əbˈvɜːrt/

obvert

перевернуть
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.
Учитель попросил студентов преобразовать утверждение для практики.
C1 noun /ˈɒktɪv/

octave

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.
C1 noun/verb /ˈoʊvərˌhæŋ/

overhang

выступ
Meaning
To extend outward and hang over something; a projecting part.
Example
The roof overhang provides shade in the summer.
Крыша оверхэнга обеспечивает тень летом.
C1 noun /ɒpˈtɒmɪtrɪst/

optometrist

оптометрист
Meaning
A healthcare professional who examines eyes and prescribes corrective lenses.
Example
The optometrist prescribed new glasses for her.
Оптометрист прописал ей новые очки.
B1 noun /ˌɑk.jəˈpeɪ.ʃən/

Occupation

профессия; занятие; захват
Meaning
a job or profession; the action of taking control of a place
Example
Teaching is her chosen occupation.
Преподавание - это ее избранная профессия.
C2 verb /ˈɒsɪfaɪ/

ossify

оссифицировать
Meaning
to turn into bone or become rigid and inflexible
Example
With age, some tissues tend to ossify.
С возрастом некоторые ткани начинают осифицироваться.
C2 adjective /ˈoʊ.pən ˈhæn.dɪd/

Open-handed

щедрый; либеральный
Meaning
Generous; liberal; giving freely;
Example
He is very open-handed with his money and always helps those in need.
Он очень щедрый со своими деньгами и всегда помогает нуждающимся.
C1 adjective /ˌɒbsəˈliːt/

obsolete

устаревший
Meaning
No longer in use or out of date.
Example
Floppy disks are now completely obsolete.
Флоппи-диски теперь полностью устарели.
C1 noun /ˈɔːrdɪnəns/

ordinance

устав
Meaning
An authoritative rule, law, or decree issued by a city, town, or authority.
Example
The city council passed an ordinance banning smoking in public parks.
Городской совет принял устав, запрещающий курение в общественных парках.
C2 adjective /ˌoʊpəˈlɛsənt/

opalescent

опаловый
Meaning
showing or reflecting a milky, iridescent light like an opal
Example
The opalescent sky glowed with shades of pink and blue.
Опалесцентное небо светилось розовыми и синими оттенками.
C1 verb /əbˈstrʌkt/

obstruct

преграждать
Meaning
to block or hinder progress; to prevent or impede movement
Example
The fallen tree obstructed the road for several hours.
Павшее дерево перегородило дорогу на несколько часов.
B1 noun /ˈɔːfɪsər/

officer

офицер
Meaning
a person in a position of authority, especially in law enforcement
Example
The officer gave him a ticket for speeding.
Офицер выписал ему штраф за превышение скорости.
C2 noun /ˌɔːrnɪˈθɒlədʒɪst/

ornithologist

орнитолог
Meaning
a scientist who studies birds
Example
The ornithologist spent years studying migratory birds.
Орнитолог провел годы, изучая мигрирующих птиц.
C1 noun /ˌɑːk.sɪˈmɔːr.ɒn/

oxymoron

оксюморон
Meaning
a figure of speech where two contradictory terms are combined
Example
The phrase 'deafening silence' is a classic oxymoron.
Фраза 'оглушительная тишина' - классический оксюморон.
C2 adjective /əˈrækjələr/

oracular

оракульный
Meaning
Resembling an oracle; giving wise, mysterious, or prophetic statements
Example
Her oracular words left the audience deep in thought.
Ее оракульные слова заставили аудиторию задуматься.
C1 noun /ˈɔːrkɪd/

Orchid

орхидея
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.
Белая орхидея на подоконнике цвела в течение нескольких месяцев.
C1 noun /əbˈzɜːvəns/

observance

соблюдение
Meaning
The practice of following a custom, rule, or religious law.
Example
The festival is held in observance of a centuries-old tradition.
Фестиваль проводится в соблюдении вековой традиции.
B2 adjective + noun ˈɒptɪməl ˈtempərətʃər

optimal temperature

оптимальная температура
Meaning
The best or most favorable temperature for a particular purpose
Example
Winter provides optimal temperature for farming.
Зима предоставляет оптимальную температуру для сельского хозяйства.
A2 noun /ˈɒm.lət/

Omelet

омлет
Meaning
a dish made from beaten eggs cooked in a frying pan and often folded around a filling
Example
She made a cheese omelet for breakfast.
Она приготовила сырный омлет на завтрак.
C2 noun /ˈɒbsɪkwi/

obsequy

похороны
Meaning
A funeral rite, usually used in plural form obsequies.
Example
The village gathered for the obsequy of their beloved teacher.
Деревня собралась для похорон их любимого учителя.
B2 noun /ˈaʊt.saɪ.dər/

Out-sider

аутсайдер
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.
Как аутсайдер, ему было трудно понять их традиции.
C2 adjective /ˈɒsiəs/

osseous

костный
Meaning
consisting of or turned into bone; bony
Example
The fossil showed osseous structures of the ancient creature.
Окаменелость показала костные структуры древнего существа.
C1 noun /ˈɒktəɡən/

octagon

восьмиугольник
Meaning
A polygon with eight sides and eight angles.
Example
The stop sign is shaped like an octagon.
Знак стоп имеет форму восьмиугольника.