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B2 noun /ˌɔː.ri.enˈteɪ.ʃən/

orientation

ориентация
Meaning
the process of becoming familiar with a new situation or environment
Example
The company provides an orientation for all new employees.
Компания предоставляет ориентирование для всех новых сотрудников.
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.
B2 noun /ˈɔːɡənɪzəm/

organism

организм
Meaning
a living thing that has an organized structure and can grow and reproduce
Example
Every organism needs water to survive.
Каждому организму нужна вода для выживания.
A2 noun /ˈoʊ.nər/

Owner

владелец
Meaning
a person who owns something; someone who has legal possession of property
Example
The owner of the restaurant greeted us warmly.
Владелец ресторана тепло нас поприветствовал.
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.
C1 verb /uːz/

ooze

просачиваться
Meaning
to slowly flow or leak out through small openings or pores
Example
Blood began to ooze from the small cut.
Кровь начала просачиваться из маленькой царапины.
C2 adjective /ˈoʊ.vɔɪd/

ovoid

овальный
Meaning
egg-shaped; resembling an oval or ellipse
Example
The artist painted an ovoid shape in the center of the canvas.
Художник нарисовал овальную форму в центре холста.
B2 noun ˈɒksɪdʒən prəˈdʌkʃən

oxygen production

производство кислорода
Meaning
The process of generating oxygen through photosynthesis or other means.
Example
Plants are vital for oxygen production and the maintenance of life.
Растения жизненно важны для производства кислорода и поддержания жизни.
A2 adjective /ˈaʊtdɔːr/

outdoor

на свежем воздухе
Meaning
situated, existing, or done outside a building
Example
We planned an outdoor picnic for the weekend.
Мы запланировали пикник на свежем воздухе на выходные.
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.
A1 adverb /ɔːf/

off

выключено
Meaning
away from a place, position, or time; not functioning
Example
He turned off the light before leaving the room.
Он выключил свет перед тем, как выйти из комнаты.
B1 noun /əˈpɪn.jən/

Opinion

мнение
Meaning
a view or judgment formed about something; a belief or assessment based on grounds short of proof
Example
In my opinion, this is the best solution.
По моему мнению, это лучшее решение.
C1 adjective /ˌaʊt ən ˈaʊt/

out-and-out

полный
Meaning
complete; absolute; used to emphasize something extreme
Example
The speech was an out-and-out lie.
Речь была полной ложью.
C2 adjective /ˌɒbsəˈlɛsnt/

obsolescent

устаревающий
Meaning
Becoming outdated or on the way to becoming obsolete.
Example
The obsolescent technology could not compete with modern devices.
Устаревающая технология не могла конкурировать с современными устройствами.
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.
C1 adjective əˈblɪv.i.əs

oblivious

невнимательный
Meaning
Being completely unaware of surrounding events.
Example
He was oblivious to the noise around him while reading.
Он не замечал шума вокруг, когда читал.
A2 noun /ˈɒpərə/

opera

опера
Meaning
a dramatic performance in which the actors sing most of their lines
Example
We watched a beautiful opera at the theater last night.
Мы посмотрели красивую оперу в театре прошлой ночью.
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.
B1 noun /ˈɑp.ʃən/

Option

опция
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.
У вас есть опция работать из дома или из офиса.
C1 adjective /oʊˈbiːs/

obese

тучный
Meaning
Extremely overweight; having an excessive amount of body fat.
Example
The doctor advised the obese patient to adopt a healthier lifestyle.
Доктор посоветовал толстому пациенту вести более здоровый образ жизни.
C1 adjective /əbˈsɛsɪv/

obsessive

навязчивый
Meaning
Relating to or characterized by an obsession; thinking about something too much.
Example
He has an obsessive interest in cleanliness.
У него навязчивый интерес к чистоте.
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.
A2 adjective /ˈɔː.dɪ.nər.i/

Ordinary

обычный; нормальный; не особенный
Meaning
normal; usual; not special
Example
It was just an ordinary day at the office.
Это был просто обычный день в офисе.
B2 verb /əˈfend/

offend

оскорблять
Meaning
to cause displeasure or resentment; to hurt someone's feelings
Example
His rude comments offended many people at the meeting.
Его грубые комментарии оскорбили многих людей на встрече.
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.
C2 adjective /əˈprəʊ.bri.əs/

opprobrious

оскорбительный
Meaning
Expressing strong criticism or scorn.
Example
He made opprobrious remarks about his opponent.
Он сделал оскорбительные замечания о своем противнике.
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 /ˌɑːpərˈtuːnɪst/

opportunist

оппортунист
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.
Его считают оппортунистом, который всегда ставит свои интересы на первое место.
B2 adjective, verb /əbˈskjʊr/

obscure

неясный
Meaning
Not clearly expressed or understood; to make something difficult to see or understand.
Example
The meaning of the poem was obscure to most readers.
Значение поэмы было непонятно большинству читателей.
A2 preposition /ˈɒntu/

onto

на
Meaning
moving to a position on the surface of something
Example
She jumped onto the table to get the book.
Она прыгнула на стол, чтобы взять книгу.
C2 noun /oʊˈbeɪsəns/

obeisance

поклон
Meaning
A gesture of respect such as a bow or curtsy.
Example
They bowed in obeisance to the king.
Они поклонились в знак почтения королю.
C1 noun ˌɒp.tɪ.maɪˈzeɪ.ʃən

optimization

оптимизация
Meaning
Improving processes to increase performance and efficiency.
Example
SEO optimization helps websites rank higher on search engines.
SEO оптимизация помогает веб-сайтам занимать более высокие позиции в поисковых системах.
C1 noun /ˈɔr.ə.kəl/

Oracle

оракул
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.
Древние греки консультировались с оракулом в Дельфах.
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.
C1 noun /oʊˈbɪt.ʃu.er.i/

Obituary

некролог
Meaning
a notice of someone's death published in a newspaper; biographical account of deceased person
Example
The newspaper published his obituary yesterday.
Газета опубликовала его некролог вчера.
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.
B2 adjective /ˈɒp.ʃən.əl/

Optional

необязательный
Meaning
not compulsory; left to choice
Example
Wearing a tie is optional for this event.
Носить галстук не обязательно для этого мероприятия.
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 /ˈoʊtˌmiːl/

oatmeal

овсяная каша
Meaning
A type of porridge made from ground oats, often eaten for breakfast.
Example
She eats a bowl of oatmeal every morning for breakfast.
Она ест тарелку овсяной каши каждое утро на завтрак.
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.
C1 adjective /ˌoʊvərˈbloʊn/

overblown

преувеличенный
Meaning
excessively exaggerated or inflated
Example
The controversy was overblown by the media.
Контроверсия была преувеличена СМИ.
C1 verb ˈɔːr.kɪ.streɪt

orchestrate

координировать
Meaning
To plan or coordinate the elements of (a situation) to produce a desired effect, especially surreptitiously.
Example
He skillfully orchestrated the entire event.
Он ловко оркестровал все мероприятия.
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 adjective /ˈoʊ.kən/

oaken

сделанный из дуба
Meaning
made of or resembling oak wood
Example
The villagers gathered around the oaken table in the hall.
Жители деревни собрались вокруг дубового стола в холле.
A2 noun /ɔɪl/

Oil

масло
Meaning
a viscous liquid derived from petroleum or plants, used for cooking or fuel
Example
Heat the oil in a pan before adding the vegetables.
Нагрейте масло в сковороде перед тем, как добавить овощи.
C1 verb /əˈfɪʃieɪt/

officiate

вести
Meaning
To perform official duties, especially in a ceremony or as a referee.
Example
The priest will officiate the wedding ceremony.
Священник будет совершать церемонию бракосочетания.
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.
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.
B1 verb /ˈɒpəreɪt/

operate

оперировать
Meaning
to function; to control or manage; to perform surgery
Example
The surgeon will operate on the patient tomorrow.
Хирург будет оперировать пациента завтра.
B2 adverb /ˈɒdli/

oddly

странно
Meaning
in a strange or unusual way; unexpectedly
Example
Oddly, he didn’t seem upset by the bad news.
Странно, но его не расстроила плохая новость.
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!
C2 adjective /ˌoʊdəˈrɪfərəs/

odoriferous

ароматный
Meaning
having or giving off a smell, especially a strong or pleasant one
Example
The garden was filled with odoriferous flowers.
Сад был наполнен ароматными цветами.
B2 verb /ˌoʊvərˈduː/

overdo

переусердствовать
Meaning
to do something too much; to exaggerate or carry to excess
Example
Don't overdo the exercise on your first day at the gym.
Не переусердствуй с упражнениями в первый день в спортзале.
C2 noun /ˈɔːfəl/

offal

потроха
Meaning
the internal organs and entrails of an animal used as food; waste parts
Example
The butcher prepared sausages using pork offal.
Мясник приготовил колбасы, используя свиные потроха.
C1 noun /ˈɑd.ɪ.ti/

Oddity

странность
Meaning
something that is strange or unusual; a peculiar trait
Example
His habit of sleeping standing up was considered an oddity.
Его привычка спать стоя считалась странностью.
A2 pronoun /aʊərˈsɛlvz/

ourselves

мы сами
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.
Мы должны помочь себе, прежде чем помочь другим.
C1 noun /ˈoʊvərˌtoʊn/

overtone

тонкая коннотация
Meaning
A subtle quality, implication, or additional meaning beyond the obvious.
Example
His speech had political overtones that were hard to ignore.
Его речь имела политические подтоны, которые было трудно игнорировать.
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.
B2 verb /ˌoʊvərˈteɪk/

overtake

обогнать
Meaning
to catch up with and pass someone or something; to surpass
Example
The runner managed to overtake his competitor in the final lap.
Бегун смог обогнать своего соперника на последнем круге.
B1 verb অকার্স

occurs

происходит
Meaning
Happens or takes place, especially as a result of something.
Example
Snowfall occurs in regions with freezing temperatures.
Снегопад происходит в регионах с температурой ниже нуля.
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.
C2 verb /ˈɑːbvieɪt/

obviate

исключать
Meaning
To remove a need or difficulty; to prevent or avoid something.
Example
This new system obviates the need for manual data entry.
Эта новая система исключает необходимость вручную вводить данные.
A1 adjective /oʊld/

old

старый
Meaning
having lived for a long time; not new or young
Example
He still drives his old car.
Он все еще ездит на своей старой машине.
C2 noun /ˈɒkjʊlɪst/

oculist

окулист
Meaning
An old-fashioned term for an eye doctor or ophthalmologist.
Example
The village oculist was known for treating various eye diseases.
Деревенский окулист был известен лечением различных заболеваний глаз.
C1 noun /ˈɑːdəsi/

odyssey

долгое путешествие
Meaning
a long, adventurous journey; a series of experiences
Example
Her career has been an odyssey of challenges and achievements.
Её карьера была одиссеей из испытаний и достижений.
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.
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 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.
C1 adjective əʊˈpeɪk

opaque

непрозрачный, непроходимый, трудный для понимания
Meaning
Not able to be seen through; not transparent; difficult to understand.
Example
The glass was too opaque to see through.
Стекло было слишком непрозрачным, чтобы увидеть через него.
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.
A2 noun /ˈoʊ.ʃən/

ocean

океан
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.
Океан покрывает более 70% поверхности Земли.
B2 noun/verb /ˌoʊvərˈlæp/

overlap

пересечение
Meaning
To extend over and cover partly; an area where things coincide.
Example
The two meetings overlap by an hour.
Две встречи перекрываются на час.
C1 noun /ˈɔr.ə.tər/

Orator

оратор
Meaning
a public speaker, especially one who is eloquent or skilled in speaking
Example
The famous orator delivered an inspiring speech.
Известный оратор произнес вдохновляющую речь.
A1 preposition /ɒn/

on

на
Meaning
physically in contact with and supported by a surface
Example
The book is on the table.
Книга на столе.
C1 verb /ˈɔːstrəˌsaɪz/

ostracize

остракировать
Meaning
to exclude someone from a group or society; to banish or shun
Example
After the scandal, he was ostracized by his former colleagues.
После скандала его остерегались его бывшие коллеги.
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.
B2 noun /ˈɒs.trɪtʃ/

Ostrich

страус
Meaning
a large flightless bird native to Africa with long legs and neck
Example
The ostrich is the world's largest bird.
Страус - самая большая птица в мире.
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.
B2 adverb /ˌoʊvərˈnaɪt/

Overnight

за ночь; внезапно; очень быстро
Meaning
during the night; suddenly; very quickly
Example
The city was transformed overnight.
Город был преобразован за ночь.
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.
B1 noun /əˈkeɪ.ʒən/

Occasion

случай; особый повод
Meaning
a particular time or instance of an event; a special celebration
Example
Their wedding was a joyous occasion.
Их свадьба была радостным случаем.
B2 adjective ɔːrˈɡæn.ɪk

organic

органический
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.
Органическое сельское хозяйство улучшает здоровье почвы и снижает загрязнение.
B2 noun /ˈaʊt.breɪk/

Out-break

вспышка
Meaning
a sudden occurrence or eruption of something, especially disease or violence
Example
The outbreak of flu affected many students in the school.
Вспышка гриппа повлияла на многих учащихся в школе.
B2 verb /ˌoʊvərˈiːt/

overeat

счастье
Meaning
To eat more food than the body needs.
Example
She tends to overeat when she is stressed.
Она не могла скрыть свое счастье, когда получила награду.
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.
C1 adjective /əbˈzɜːrvənt/

Observant

наблюдательный
Meaning
quick to notice things; watchful; attentive
Example
The observant detective noticed every small detail at the crime scene.
Наблюдательный детектив заметил каждую мелочь на месте преступления.
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.
B2 noun /ˈaʊtˌfɪt/

outfit

наряд
Meaning
A set of clothes worn together, often for a particular occasion.
Example
She wore a beautiful outfit to the party.
Она носила красивый наряд на вечеринку.
C1 verb /ˌoʊvərˈriːtʃ/

overreach

перегрузка
Meaning
to go beyond what is proper, acceptable, or achievable; to overextend
Example
The politician overreached by making promises he couldn't keep.
Политик перегрузил себя, пообещав то, чего не мог выполнить.
C1 adjective /ˌɑːpərˈtuːn/

opportune

удобный момент
Meaning
Happening at a suitable or convenient time.
Example
She arrived at an opportune moment to help.
Она приехала в удобный момент, чтобы помочь.
B2 adjective /aʊtˈstændɪŋ/

outstanding

выдающийся
Meaning
extremely good or impressive; not yet resolved or paid
Example
She received an award for her outstanding performance.
Она получила награду за свою выдающуюся работу.
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 /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 adjective /ˈɑːsɪˌfaɪd/

ossified

превращенный в кость, жесткий
Meaning
Turned into bone or become rigid; unwilling to change.
Example
The company had an ossified management structure that resisted innovation.
Компания имела жесткую структуру управления, которая сопротивлялась инновациям.
B2 noun /ˈoʊ.vər ɡroʊθ/

Over growth

чрезмерный рост
Meaning
excessive growth beyond normal size; too much development or expansion
Example
The overgrowth of weeds made the garden look untidy.
Заросли сорняков сделали сад неопрятным.
A2 adjective /ˈɒb.vi.əs/

Obvious

очевидный; легко воспринимаемый
Meaning
easily perceived or understood; clear and apparent to the mind
Example
It was obvious that she was upset about something.
Было очевидно, что она была расстроена чем-то.
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 /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.
B1 noun /ˌɒpəˈreɪʃən/

operation

операция
Meaning
an act or process of functioning or operating
Example
The hospital performed a successful operation.
Больница провела успешную операцию.
C2 adjective /ɒˈstɛnsɪv/

ostensive

остенсивный
Meaning
clearly demonstrative or pointing out; explicitly shown
Example
The teacher gave an ostensive example to clarify the concept.
Учитель привел остенсивный пример, чтобы разъяснить концепцию.
C2 noun /ˈɔːrɪndʒfɪn ˈleɪbiːoʊ/

Orangefin labeo

оранжевоплавничный лабео
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.
Оранжевоплавничный лабео — важная пищевая рыба в Бангладеш.
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.
A2 adjective/adverb /ˈɒnˌlaɪn/

online

онлайн
Meaning
connected to or available through the internet
Example
I prefer shopping online rather than going to stores.
Я предпочитаю делать покупки онлайн, а не ходить по магазинам.
A1 pronoun, noun, adjective /wʌn/

one

один
Meaning
the number equivalent to the sum of zero and one; a single person or thing
Example
Only one student answered the question.
Только один студент ответил на вопрос.
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.
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.
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.
B2 verb /ˌoʊvərˈlʊk/

overlook

игнорировать
Meaning
to fail to notice or consider something; to have a view from above
Example
It's easy to overlook small details when you're in a hurry.
Легко не заметить мелкие детали, когда торопишься.
B1 verb /əbˈzɜːrv/

observe

наблюдать
Meaning
to watch carefully; to notice or perceive something
Example
Scientists observe the behavior of animals in the wild.
Учёные наблюдают за поведением животных в дикой природе.
A1 verb /ˈoʊpən/

open

открывать
Meaning
to move something so as to allow access; to begin
Example
Please open the door for me.
пожалуйста, откройте дверь для меня.
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 /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.
B2 noun /ˈɒfərɪŋ/

offering

предложение
Meaning
something that is given, especially as a gift or contribution
Example
The company’s latest offering is an eco-friendly car.
Последнее предложение компании - это экологически чистый автомобиль.
C2 noun /ɒmˈnɪpətəns/

omnipotence

всемогущество
Meaning
The quality of having unlimited power or authority.
Example
Many religions describe God’s omnipotence as absolute.
Многие религии описывают всемогущество Бога как абсолютное.
C1 adjective /ˌɒstɛnˈteɪʃəs/

ostentatious

претенциозный
Meaning
Characterized by a showy or pretentious display intended to impress others.
Example
He wore an ostentatious gold chain to the party.
Он носил на вечеринке претенциозную золотую цепочку.
B1 adjective /ˌoʊvərˈweɪt/

overweight

избыточный вес
Meaning
heavier than is considered healthy or normal
Example
The doctor advised him to lose weight as he was overweight.
Врач посоветовал ему сбросить вес, так как он был с избыточным весом.
B1 noun /ˈɑb.stə.kəl/

Obstacle

препятствие
Meaning
something that blocks or makes progress difficult; a barrier
Example
Bad weather was the main obstacle to our journey.
Плохая погода была главным препятствием на нашем пути.
B2 noun /ˈaʊtˌsɛt/

outset

начало
Meaning
the beginning or start of something
Example
From the outset, the project seemed ambitious but achievable.
С самого начала проект казался амбициозным, но достижимым.
A1 conjunction /ɔːr/

or

или
Meaning
used to link alternatives
Example
You can have tea or coffee.
Вы можете пить чай или кофе.
C1 adjective /ˈɔːrdɪnəl/

ordinal

порядковый
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.
Число 'третий' порядковое указывает на позицию в последовательности.