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A1 noun/adjective/adverb /ˌaʊtˈsaɪd/

outside

снаружи
Meaning
the external part or surface of something; beyond the boundary
Example
Children were playing outside in the yard.
Дети играли на улице в саду.
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.
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 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 adverb /ˈaʊtraɪt/

Outright

прямо; полностью; без всяких оговорок
Meaning
completely; directly; without reservation or concealment
Example
She rejected the proposal outright.
Она отклонила предложение прямо.
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.
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 /ˈaʊtlʊk/

outlook

перспектива, прогноз
Meaning
a person's general attitude or view; a forecast or prospect
Example
The economic outlook for the year is positive.
Экономический прогноз на год положительный.
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 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.
C2 verb /ˈoʊɡəl/

ogle

пялиться
Meaning
To look at someone with obvious sexual interest.
Example
He kept ogling the models on the runway.
Он продолжал пялиться на модели на подиуме.
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 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.
C2 noun /ɑːlˈfækʃən/

olfaction

обоняние
Meaning
The sense of smell; the process of detecting and perceiving odors.
Example
Dogs have a highly developed sense of olfaction.
У собак хорошо развиты обоняние.
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.
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.
B2 adjective /ˌoʊvərˈwɛlmɪŋ/

overwhelming

поражающий
Meaning
Very intense; overpowering.
Example
Large tasks can feel overwhelming.
Большие задачи могут казаться поражающими.
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.
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.
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.
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.
A1 pronoun /ˈʌðərz/

others

другие
Meaning
people or things distinct from the ones already mentioned or known
Example
I like to spend time with others.
Мне нравится проводить время с другими.
B2 noun ˈəʊ.və.hed

overhead

накладные расходы
Meaning
Ongoing business expenses not directly attributable to creating a product or service.
Example
The company reduced its overhead to increase profits.
Компания сократила накладные расходы, чтобы увеличить прибыль.
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.
A1 adverb /aʊt/

out

наружу
Meaning
moving or appearing away from the inside or center; not at home or present
Example
He stepped out of the room quietly.
Он тихо вышел из комнаты.
C2 adjective /ˈɒpjʊlənt/

opulent

роскошный
Meaning
Ostentatiously rich, luxurious, or lavish.
Example
They hosted an opulent wedding with gold decorations.
Они устроили роскошную свадьбу с золотыми украшениями.
A1 verb, adjective /oʊn/

own

владеть
Meaning
to possess something; belonging to oneself
Example
She owns a beautiful house in the city.
Она владеет красивым домом в городе.
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.
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.
C2 noun /ˌɑːbdʒərˈɡeɪʃən/

objurgation

строгий выговор
Meaning
a harsh scolding or strong rebuke
Example
His misconduct earned him a severe objurgation from the manager.
Его проступок вызвал строгий выговор от менеджера.
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.
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.
C2 verb /əbˈtruːd/

obtrude

вторгаться
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.
Он не хотел вторгаться в их личный разговор.
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 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.
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.
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.
A1 adjective /oʊˈkeɪ/

ok

хорошо
Meaning
used to indicate agreement, approval, or understanding
Example
Okay, let's go to the park.
Хорошо, давай пойдем в парк.
C1 adverb /ˈɒp.tɪ.məl.i/

optimally

оптимально
Meaning
In the most effective or efficient way possible.
Example
Tasks should be allocated optimally for maximum output.
Задачи должны быть распределены оптимально для максимального результата.
A2 noun /ˈɒbdʒɪkt/

object

объект
Meaning
a thing that can be seen and touched
Example
The table is an object in the room.
Стол — это объект в комнате.
C2 verb /ˈɑːskjʊleɪt/

osculate

целовать
Meaning
To kiss.
Example
They osculated under the mistletoe during the party.
Они поцеловались под омелой на вечеринке.
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.
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.
C2 adjective /əbˈstrɛpərəs/

obstreperous

шумный и трудный для контроля
Meaning
Noisy and difficult to control.
Example
The obstreperous students disrupted the class.
Шумные студенты нарушили урок.
B2 noun /ˈɒp.tɪ.mɪ.zəm/

optimism

оптимизм
Meaning
Hopefulness and confidence about the future or the successful outcome of something.
Example
Her optimism helped her overcome difficult times.
Её оптимизм помог ей преодолеть трудные времена.
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 /ˈoʊdiəm/

odium

презрение
Meaning
general or widespread hatred or disgust directed toward someone as a result of their actions
Example
The scandal brought public odium on the corrupt minister.
Скандал принес общественное презрение к коррумпированному министру.
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 noun /ˌɑːsɪˈleɪʃən/

oscillation

колебание
Meaning
The movement back and forth at a regular speed.
Example
The oscillation of the pendulum controls the clock.
Колебания маятника управляют часами.
C1 verb /ˌoʊvərˈruːl/

overrule

отменить
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.
Судья отклонил возражение адвоката защиты.
B1 noun ˌɒpəˈtjuːnɪtiz

opportunities

возможности
Meaning
A set of circumstances that makes it possible to do something; chances for advancement or success.
Example
Opportunities for jobs decreased.
Возможности для работы уменьшились.
B2 noun/verb /ˈoʊvərˌdoʊs/

overdose

передозировка
Meaning
An excessive and dangerous amount of a drug; to take too much of a substance.
Example
He was rushed to the hospital after a drug overdose.
Он был доставлен в больницу после передозировки наркотиков.
C2 noun /ˈɔːrzmən/

Oarsman

гребец
Meaning
a person who rows a boat, especially as a member of a racing crew
Example
The experienced oarsman rowed the boat across the river.
Опытный гребец греб лодку через реку.
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 adverb; noun /ˌaʊtˈdɔːrz/

outdoors

на открытом воздухе
Meaning
outside a building; the natural environment outside
Example
We spent the whole afternoon outdoors enjoying the fresh air.
Мы провели весь день на открытом воздухе, наслаждаясь свежим воздухом.
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.
B2 noun ˈaʊt.pʊt

output

производство
Meaning
The amount of something produced by a person, machine, or industry.
Example
Climate change reduces agricultural output.
Изменение климата снижает сельскохозяйственное производство.
C2 noun /ˈɒlɪv bɑːb/

Olive barb

оливковый барбус
Meaning
A small freshwater fish with olive-colored body and barbels
Example
The olive barb is commonly found in South Asian rivers.
Оливковый барбус обычно встречается в реках Южной Азии.
A2 noun əˈlɪm.pɪk ɡeɪmz

Olympic Games

олимпийские игры
Meaning
The world's largest international sports competition held every four years, bringing together athletes from different countries to compete in various sports.
Example
The Olympic Games bring together the world's top athletes.
Олимпийские игры собирают лучших спортсменов мира.
A1 pronoun /aʊərz/

ours

наш
Meaning
belonging to or associated with us
Example
This victory is ours.
Эта победа наша.
C2 noun /ˈɒlɪv brɑːntʃ/

olive-branch

оливковая ветвь
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.
Он протянул оливковую ветвь своему сопернику после многих лет вражды.
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.
B2 adverb /ˈoʊpənli/

Openly

открыто; публично
Meaning
in a frank and honest way; without concealment; publicly
Example
She spoke openly about her struggles with mental health.
Она откровенно говорила о своих проблемах с психическим здоровьем.
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 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 /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.
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.
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.
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.
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 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.
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 /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.
B2 noun /ˈaʊt.laɪn/

Outline

контур; план; схема
Meaning
a general description or plan showing the essential features of something; the main points
Example
The teacher provided an outline of the course syllabus.
Учитель предоставил контур учебного плана курса.
B1 adjective /ˈɔːɡənaɪzd/

organized

организованный
Meaning
Arranged in a systematic way, especially on a large scale.
Example
An organized approach to work increases productivity and reduces stress.
Организованный подход к работе повышает продуктивность и снижает стресс.
B2 noun /əˈfens/

Offence

проступок; нарушение закона
Meaning
a breach of law or rule; an annoyance or resentment
Example
Stealing is a serious offence punishable by law.
Кража — это серьёзный проступок, подлежащий наказанию по закону.
B2 noun /ˈɔr.fən.ɪʒ/

Orphanage

детский дом
Meaning
an institution for the care and education of children who have lost their parents
Example
The charity built a new orphanage for homeless children.
Благотворительная организация построила новый детский дом для бездомных детей.
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!
C1 noun ˌoʊ.vɚˈɡreɪ.zɪŋ

overgrazing

перегрузка пастбища
Meaning
The practice of allowing livestock to graze to the point of damaging vegetation.
Example
Overgrazing leads to soil erosion and loss of biodiversity.
Перегрузка пастбищ ведет к эрозии почвы и потере биоразнообразия.
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.
B1 verb /oʊ/

owe

быть должен
Meaning
to be under obligation to pay or repay; to be indebted
Example
I owe my success to my parents' support.
Я обязан своим успехом поддержке моих родителей.
B2 noun /ˈaʊtɪŋ/

outing

поездка
Meaning
a short trip or excursion, often for leisure or enjoyment
Example
They had a lovely outing at the beach last weekend.
Они провели замечательную поездку на пляже в прошлые выходные.
C2 noun /ˌɒpəˈrɛtə/

operetta

легкая опера
Meaning
a short opera with light and humorous themes
Example
The theater staged a famous operetta by Gilbert and Sullivan.
Театр поставил известную оперетту Гилберта и Салливана.
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.
C1 adjective /əbˈdʒek.ʃən.ə.bəl/

Objectionable

неприемлемый
Meaning
arousing distaste or opposition; unpleasant or offensive
Example
His objectionable behavior made everyone uncomfortable.
Его неприемлемое поведение заставило всех чувствовать себя неловко.
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.
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.
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.
B1 adjective /ˌoʊld ˈfæʃənd/

old-fashioned

старомодный
Meaning
not modern; belonging to an earlier time
Example
He still wears an old-fashioned hat.
Он всё ещё носит старомодную шляпу.
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.
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.
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 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 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.
B1 adverb /əˈrɪdʒɪnəli/

originally

изначально
Meaning
in the beginning, at first
Example
Originally, she wanted to be a doctor.
Изначально она хотела стать врачом.
C1 adjective /ˈɔːrθədɑːks/

orthodox

ортодоксальный
Meaning
conforming to traditional beliefs or practices
Example
He comes from a very orthodox family.
Он родом из очень ортодоксальной семьи.
A2 verb /ˈɔːfər/

offer

предлагать
Meaning
to present something for acceptance or rejection; to propose
Example
She offered to help with the project.
Она предложила помочь с проектом.
B1 noun /ˈɒbstəkəlz/

obstacles

препятствия
Meaning
Things that block one's way or prevent or hinder progress.
Example
Obstacles in life can often lead to valuable lessons.
Препятствия в жизни часто приводят к ценным урокам.
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.
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.
A2 adverb /ˈɒbviəsli/

obviously

очевидно
Meaning
in a way that is easily perceived or understood; clearly
Example
Obviously, he didn’t read the instructions.
Очевидно, он не прочитал инструкции.
C1 adjective /ˈɒm.ɪ.nəs/

Ominous

зловещий; угрожающий
Meaning
giving the impression that something bad will happen; threatening; foreboding
Example
The dark clouds looked ominous before the storm.
Тёмные облака казались зловещими перед штормом.
C1 noun /ˌɒk.sɪ.dʒɪˈneɪ.ʃən/

oxygenation

поставка или лечение кислородом
Meaning
The process of supplying or treating with oxygen.
Example
Deep breathing exercises improve oxygenation of the body.
Упражнения на глубокое дыхание улучшают кислородоснабжение тела.
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.
B2 noun /ˈɑp.tə.mɪst/

Optimist

оптимист
Meaning
a person who tends to be hopeful and confident about the future; someone who sees the good side of things
Example
As an optimist, she always believed things would improve.
Как оптимист, она всегда верила, что вещи улучшатся.
C2 noun ˈɒpjʊləns

opulence

роскошь
Meaning
Great wealth or luxuriousness.
Example
The opulence of the mansion was evident in its ornate furnishings.
Роскошь особняка была очевидна в его орнаментальной мебели.
B2 noun ɔːˈɡæn.ɪk fuːdz

organic foods

органические продукты
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.
Органические продукты полезнее, чем переработанные продукты.
B2 noun /ˈɔːɡən/

organ

орган
Meaning
a part of the body that performs a specific function
Example
The heart is an important organ in the human body.
Сердце — важный орган в человеческом теле.
B1 adverb /əˈkeɪʒənəli/

Occasionally

иногда; время от времени;
Meaning
sometimes; from time to time; not regularly
Example
I occasionally visit my grandmother on weekends.
Я иногда навещаю свою бабушку по выходным.
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.
C1 adjective /ˈɒptɪkəl/

optical

оптический
Meaning
related to or used in seeing or sight
Example
The optical illusion fooled everyone at the exhibition.
Оптическая иллюзия обманула всех на выставке.
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.
A2 noun /ˈʌn.jən/

Onion

лук
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.
Мне нужно порезать несколько луковиц для рецепта карри.
C1 noun ˌɒk.sɪˈdeɪ.ʃən

oxidation

окисление
Meaning
A chemical reaction that involves the combination of a substance with oxygen, often causing deterioration.
Example
Oxidation causes metal surfaces to weaken.
Окисление ослабляет металлические поверхности.
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.
C2 noun /əbˈstrʌkʃənɪst/

obstructionist

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.
C1 verb /ˌoʊvərˈθroʊ/

overthrow

счастье
Meaning
To remove a leader or government from power, often by force.
Example
The rebels planned to overthrow the corrupt regime.
Она не могла скрыть своего счастья, когда получила награду.
C1 noun /ˈɒn.slɔːt/

onslaught

наступление
Meaning
A fierce or destructive attack.
Example
The village faced an onslaught of enemy forces.
Деревня столкнулась с нападением вражеских войск.
B2 verb /ɒpt/

opt

выбирать
Meaning
to choose or decide to do something instead of something else
Example
Many students opt to study abroad for better opportunities.
Многие студенты выбирают учёбу за границей ради лучших возможностей.
B2 noun /ɔːˈræŋ.ʊˌtæŋ/

Orang-Outang

орангутан
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.
Орангутан изящно качается через верхушки деревьев.