C1 noun/verb /ˈoʊvərˌhæŋ/

overhang

突出部

Meaning

To extend outward and hang over something; a projecting part.

Example

The roof overhang provides shade in the summer.

屋根のオーバーハングは夏に日陰を提供します。

B2 verb /ˌoʊvərˈteɪk/

overtake

追い越す

Meaning

to catch up with and pass someone or something; to surpass

Example

The runner managed to overtake his competitor in the final lap.

ランナーは最後の周回で競争相手を追い越しました。

C1 adjective /əbˈsɛsɪv/

obsessive

執着的

Meaning

Relating to or characterized by an obsession; thinking about something too much.

Example

He has an obsessive interest in cleanliness.

彼は清潔さに執着的な興味を持っています。

B2 adjective ˌɒp.ərˈeɪ.ʃən.əl

operational

運用可能

Meaning

In working order; ready for use.

Example

The space project will be operational by 2025.

宇宙計画は2025年までに運用可能になります。

B1 verb /ˈɒpəreɪt/

operate

操作する

Meaning

to function; to control or manage; to perform surgery

Example

The surgeon will operate on the patient tomorrow.

外科医は明日患者を手術します。

C2 adjective /əbˈstrɛpərəs/

obstreperous

騒がしくて制御が難しい

Meaning

Noisy and difficult to control.

Example

The obstreperous students disrupted the class.

騒がしい学生たちが授業を妨害した。

A1 pronoun, noun, adjective /wʌn/

one

一

Meaning

the number equivalent to the sum of zero and one; a single person or thing

Example

Only one student answered the question.

ただ一人の学生が質問に答えました。

C2 adjective /ˈoʊ.vɔɪd/

ovoid

卵型

Meaning

egg-shaped; resembling an oval or ellipse

Example

The artist painted an ovoid shape in the center of the canvas.

アーティストはキャンバスの中央に卵型の形を描きました。

C1 verb /uːz/

ooze

にじみ出る

Meaning

to slowly flow or leak out through small openings or pores

Example

Blood began to ooze from the small cut.

血が小さな切り傷からにじみ出た。

B2 verb /ˌoʊvərˈwɛlm/

overwhelm

Meaning

to overpower someone emotionally or physically; to be too much to handle

Example

She was overwhelmed with gratitude after receiving the help.

B1 noun /ˈɑb.stə.kəl/

Obstacle

障害物

Meaning

something that blocks or makes progress difficult; a barrier

Example

Bad weather was the main obstacle to our journey.

悪天候が私たちの旅行の最大の障害物でした。

C1 verb /ˌoʊvərˈruːl/

overrule

却下する

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.

裁判官は弁護側の異議を却下した。

C1 noun ˌɒk.sɪˈdeɪ.ʃən

oxidation

酸化

Meaning

A chemical reaction that involves the combination of a substance with oxygen, often causing deterioration.

Example

Oxidation causes metal surfaces to weaken.

酸化は金属表面を弱めます。

C2 adjective /ˈɒfɪʃ/

offish

無愛想

Meaning

Unfriendly, distant, or reserved in manner.

Example

He seemed offish at the party and avoided most conversations.

彼はパーティーで無愛想に見え、大半の会話を避けていました。

C1 adjective /ˌəʊ.vərˈɑː.tʃɪŋ/

overarching

全体的な, 包括的な, 包み込む

Meaning

Comprehensive or all-embracing; forming an arch over something.

Example

The overarching theme of the book is human resilience.

その本の大きなテーマは人間の回復力です。

C1 noun /ˌɒbstəˈtrɪʃən/

obstetrician

産科医

Meaning

A doctor specializing in pregnancy, childbirth, and women's reproductive health.

Example

The obstetrician monitored the mother’s health throughout the pregnancy.

産科医は妊娠中の母親の健康を監視しました。

C2 noun /ˌɔːrdɪˈneɪʃən/

ordination

任命式

Meaning

The ceremony of conferring holy orders or official religious authority.

Example

The church held a special service for the ordination of new priests.

教会は新しい神父の任命のために特別なサービスを行いました。

C2 noun /ˈɒlɪv bɑːb/

Olive barb

オリーブバーブ

Meaning

A small freshwater fish with olive-colored body and barbels

Example

The olive barb is commonly found in South Asian rivers.

オリーブバーブは南アジアの川によく見られます。

A1 preposition /ɒn/

on

上

Meaning

physically in contact with and supported by a surface

Example

The book is on the table.

本はテーブルの上にあります。

C1 noun /ˌɒk.sɪ.dʒɪˈneɪ.ʃən/

oxygenation

酸素供給または治療

Meaning

The process of supplying or treating with oxygen.

Example

Deep breathing exercises improve oxygenation of the body.

深呼吸の練習は身体の酸素供給を改善します。

A1 adverb /ɔːf/

off

オフ

Meaning

away from a place, position, or time; not functioning

Example

He turned off the light before leaving the room.

彼は部屋を出る前に電気をオフにしました。

B2 noun /ˈaʊt.breɪk/

Out-break

発生

Meaning

a sudden occurrence or eruption of something, especially disease or violence

Example

The outbreak of flu affected many students in the school.

インフルエンザの流行は学校の多くの生徒に影響を与えた。

C1 adjective /əbˈzɜːrvənt/

Observant

観察力のある

Meaning

quick to notice things; watchful; attentive

Example

The observant detective noticed every small detail at the crime scene.

観察力のある探偵は犯罪現場のあらゆる小さな詳細に気づきました。

B2 noun ˈoʊzoʊn dɪˈpliʃən

ozone depletion

オゾン層の減少

Meaning

The reduction in the amount of ozone in the Earth's stratosphere, leading to increased UV radiation.

Example

Ozone depletion increases UV radiation.

オゾン層の減少はUV放射線を増加させます。

B2 verb /ˌoʊvərˈpeɪ/

overpay

過剰に支払う

Meaning

To pay more than is necessary or reasonable.

Example

She realized she had overpaid for the concert tickets.

彼女はコンサートのチケットに多く支払ったことに気づきました。

A2 pronoun /aʊərˈsɛlvz/

ourselves

私たち自身

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.

私たちは他の人を助ける前に、自分たち自身を助けるべきです。

C2 adjective /ˌɔːfˈkiː/

off-key

外れた音

Meaning

out of tune; not in accordance with expected standards

Example

The singer was slightly off-key during the performance.

歌手はパフォーマンス中に少し外れた音だった。

C2 noun /ɒmˈnɪpətəns/

omnipotence

全能

Meaning

The quality of having unlimited power or authority.

Example

Many religions describe God’s omnipotence as absolute.

多くの宗教では神の全能は絶対的なものと説明されています。

A2 noun /ɔɪl/

Oil

油

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.

野菜を加える前にフライパンで油を温めます。

C2 adjective /əbˈtruːsɪv/

obtrusive

目障りな

Meaning

noticeable in an unpleasant or unwelcome way; intrusive

Example

The advertisement was so obtrusive that it ruined the user’s experience.

その広告はあまりにも目立ちすぎて、ユーザーの体験を台無しにしました。

B2 noun /ˌɔː.ri.enˈteɪ.ʃən/

orientation

オリエンテーション

Meaning

the process of becoming familiar with a new situation or environment

Example

The company provides an orientation for all new employees.

会社はすべての新しい従業員にオリエンテーションを提供します。

B1 adjective /əˈbiː.di.ənt/

Obedient

従順な

Meaning

willing to comply with orders or instructions; submissive

Example

The obedient student always follows the teacher's instructions.

従順な生徒はいつも先生の指示に従う。

B2 verb /əˈfend/

offend

侮辱する

Meaning

to cause displeasure or resentment; to hurt someone's feelings

Example

His rude comments offended many people at the meeting.

彼の無礼なコメントは会議で多くの人々を怒らせました。

B2 verb /ˌoʊvərˈloʊd/

overload

過負荷

Meaning

to load with too much weight or cargo; to give too much work or information

Example

Don't overload the washing machine or it might break down.

洗濯機をオーバーロードしないでください、壊れるかもしれません。

C2 adjective /əbˈsiːkwɪəs/

obsequious

お世辞

Meaning

Excessively obedient or attentive in a servile way.

Example

The waiter gave an obsequious bow to every customer.

ウェイターは各顧客にお世辞のようなお辞儀をしました。

C1 adjective /ˈəʊnərəs/

onerous

重い

Meaning

involving a great deal of effort, difficulty, or burden

Example

Fulfilling the contract proved to be an onerous task for the company.

契約を履行することは会社にとって負担の大きい仕事だと証明された。

A2 adverb /ˈɒbviəsli/

obviously

明らかに

Meaning

in a way that is easily perceived or understood; clearly

Example

Obviously, he didn’t read the instructions.

もちろん、彼は指示を読まなかった。

C2 adjective /ˌoʊpəˈlɛsənt/

opalescent

オパール色の

Meaning

showing or reflecting a milky, iridescent light like an opal

Example

The opalescent sky glowed with shades of pink and blue.

オパレッセントな空はピンクと青の色合いで輝いていた。

C2 verb /oʊˈpaɪn/

opine

意見を述べる

Meaning

to express an opinion or belief

Example

The professor opined that the policy would fail.

教授はその政策が失敗するだろうと述べました。

B2 noun /ˈɔr.fən.ɪʒ/

Orphanage

孤児院

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.

チャリティーはホームレスの子供たちのために新しい孤児院を建てました。

C2 noun /ˈoʊ.vər.let/

Overlet

ベッドパッド

Meaning

a thin mattress or pad placed over a bed for additional comfort

Example

The overlet makes the bed more comfortable to sleep on.

オーバーレットはベッドをより快適にして眠りやすくします。

C2 adjective /ˈɔːrnəri/

ornery

気難しい

Meaning

bad-tempered and combative; stubborn

Example

The ornery old man refused to leave his chair.

その気難しい老人は椅子を離れようとしませんでした。

C1 adjective /ˌɒmnɪˈprezənt/

omnipresent

至る所に存在する

Meaning

(of God) present everywhere at the same time.

Example

Social media has become an omnipresent force in modern society.

ソーシャルメディアは現代社会において至る所に存在する力となりました。

C1 adjective /ˈɑp.ər.ə.tɪv/

Operative

作動中の; 効力を持つ; 仕事をしている; 操作可能な;

Meaning

Functioning; in effect; working; active;

Example

The new safety protocols became operative immediately after the accident.

新しい安全プロトコルは事故後すぐに作動しました。

C1 adjective /aʊtˈmoʊdɪd/

outmoded

時代遅れ

Meaning

No longer in fashion or useful; outdated.

Example

That old computer is completely outmoded.

その古いコンピューターは完全に時代遅れです。

C2 verb /ˌaʊtməˈnuːvər/

outmaneuver

巧妙に出し抜く

Meaning

to gain an advantage over an opponent by skillful or clever action

Example

The smaller company managed to outmaneuver its larger rival.

小さな会社は大きな競争相手を巧妙に出し抜くことに成功した。

B1 noun /aʊl/

Owl

フクロウ

Meaning

a nocturnal bird of prey with large eyes and a hooked beak

Example

The owl hooted softly in the darkness of the forest.

フクロウは森の暗闇で静かに鳴いた。

B2 verb /ˌoʊvərˈlʊk/

overlook

見落とす

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.

急いでいると、細かい点を見落とすことがあります。

B2 noun /əbˈzɜːvər/

observer

観察者

Meaning

a person who watches or notices something

Example

The observer took notes during the meeting.

観察者は会議中にメモを取った。

A1 noun/adjective/adverb /ˌaʊtˈsaɪd/

outside

外

Meaning

the external part or surface of something; beyond the boundary

Example

Children were playing outside in the yard.

子供たちは庭で外で遊んでいました。

C1 adjective /əbˈdʒek.ʃən.ə.bəl/

Objectionable

不快な

Meaning

arousing distaste or opposition; unpleasant or offensive

Example

His objectionable behavior made everyone uncomfortable.

彼の不快な行動は、皆を不快にさせた。

C2 verb /ˈɑːbdʒərˌɡeɪt/

objurgate

厳しく叱る

Meaning

to scold or rebuke severely

Example

The teacher objurgated the student for being dishonest.

先生は不正直な生徒を厳しく叱った。

B2 adjective /ˈɔː.rəl/

Oral

口頭の; 口に関する

Meaning

spoken rather than written; relating to the mouth

Example

The oral examination will test your speaking skills.

口頭試験はあなたの話す能力をテストします。

C1 adjective /ˌɒstɛnˈteɪʃəs/

ostentatious

見せびらかしの

Meaning

Characterized by a showy or pretentious display intended to impress others.

Example

He wore an ostentatious gold chain to the party.

彼はパーティーで見せびらかしの金のチェーンをしていました。

B2 adjective /aʊtˈreɪdʒəs/

outrageous

ショッキング

Meaning

Shockingly bad or excessive; very unusual or amusing.

Example

The comedian told an outrageous joke.

コメディアンはショッキングなジョークを言いました。

C2 verb /əbˈtruːd/

obtrude

押し付ける

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.

彼は彼らのプライベートな会話に押し付けたくなかった。

C1 adjective /əˈbliːk/

Oblique

斜め; 対角線; 間接的または回避的

Meaning

slanting; diagonal; indirect or evasive

Example

The artist drew an oblique line across the canvas.

アーティストはキャンバスに斜めの線を描いた。

C2 adjective /ˈəʊ.dər.əs/

Odorous

芳香のある; 香り高い

Meaning

having a strong smell; fragrant; aromatic

Example

The garden was filled with odorous flowers.

庭は芳香のある花で満たされていた。

C2 verb /ˌoʊvərˈliːp/

overleap

飛び越える

Meaning

To jump over something; to omit or disregard something.

Example

He managed to overleap the fence easily.

彼は簡単にフェンスを飛び越えました。

C1 verb /ˈɔːstrəˌsaɪz/

ostracize

追放する

Meaning

to exclude someone from a group or society; to banish or shun

Example

After the scandal, he was ostracized by his former colleagues.

スキャンダル後、彼は元同僚に追放された。

C2 noun /ˈɔːrɪndʒfɪn ˈleɪbiːoʊ/

Orangefin labeo

オレンジフィンラベオ

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.

オレンジフィンラベオはバングラデシュで重要な食用魚です。

C1 adjective əʊˈpeɪk

opaque

不透明, 理解しにくい

Meaning

Not able to be seen through; not transparent; difficult to understand.

Example

The glass was too opaque to see through.

そのガラスは不透明すぎて、透けて見えませんでした。

C1 adjective /ˌaʊtˈspoʊkən/

Outspoken

率直

Meaning

frank; speaking directly

Example

She is known for being outspoken about social issues.

彼女は社会問題について率直に話すことで知られています。

C1 adjective /əˈblaɪdʒɪŋ/

obliging

親切な

Meaning

Willing to help or do favors; accommodating.

Example

The staff at the hotel were very obliging and friendly.

ホテルのスタッフはとても親切で友好的でした。

C1 noun /ˈɒf.sprɪŋ/

offspring

子孫

Meaning

a person's child or children; an animal's young

Example

The bird carefully fed its offspring.

その鳥は注意深く自分の子孫に餌を与えました。

C2 noun /ˈɒbsɪkwi/

obsequy

葬儀

Meaning

A funeral rite, usually used in plural form obsequies.

Example

The village gathered for the obsequy of their beloved teacher.

村人たちは、愛する教師の葬儀のために集まりました。

B2 noun /ˌɒpəˈzɪʃən/

opposition

反対

Meaning

the action of opposing or resisting something

Example

The opposition to the new law was strong.

新しい法律に対する反対は強かった。

C2 noun /ˌɔːrnɪˈθɑːlədʒi/

ornithology

鳥類学

Meaning

the scientific study of birds

Example

She pursued ornithology to understand the migration patterns of birds.

彼女は鳥の移動パターンを理解するためにオルニソロジーを追求しました。

A1 pronoun /ˈʌðərz/

others

他の人々

Meaning

people or things distinct from the ones already mentioned or known

Example

I like to spend time with others.

私は他の人々と時間を過ごすのが好きです。

C2 noun /ˈɔːrdnəns/

ordnance

軍需品

Meaning

Military supplies including weapons, ammunition, and combat equipment.

Example

The army stored ordnance in a secure facility outside the city.

軍隊は都市外の安全な施設に軍需品を保管していた。

B2 noun /ˈɒp.tɪ.mɪ.zəm/

optimism

楽観主義

Meaning

Hopefulness and confidence about the future or the successful outcome of something.

Example

Her optimism helped her overcome difficult times.

彼女の楽観主義は、困難な時期を乗り越える助けとなりました。

C1 adjective /əˈprɛs.ɪv/

Oppressive

抑圧的

Meaning

Harsh and authoritarian; overwhelming; causing distress; tyrannical;

Example

The oppressive heat made it difficult to work outside during the summer.

厳しい暑さは夏の間外で働くのを難しくした。

C1 adjective əˈblɪv.i.əs

oblivious

無自覚

Meaning

Being completely unaware of surrounding events.

Example

He was oblivious to the noise around him while reading.

彼は読書中に周りの騒音に全く無自覚だった。

B2 noun /ˈaʊtˌbreɪk/

outbreak

発生

Meaning

a sudden start or occurrence of something unpleasant, like disease or violence

Example

There was an outbreak of flu in the city.

街でインフルエンザが発生した。

C2 noun /ˈɔːfəl/

offal

内臓

Meaning

the internal organs and entrails of an animal used as food; waste parts

Example

The butcher prepared sausages using pork offal.

肉屋は豚の臓物を使ってソーセージを作った。

C1 verb /ɔːrˈdeɪn/

ordain

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.

C2 noun /ˌɔːrəˈtɔːri.oʊ/

oratorio

宗教音楽作品

Meaning

A large-scale musical composition for orchestra, choir, and soloists, usually on a sacred theme, performed without costumes or scenery.

Example

Handel's 'Messiah' is one of the most famous oratorios ever written.

ヘンデルの『メサイア』は最も有名なオラトリオの1つです。

B2 adjective /ˈaʊtˌɡoʊɪŋ/

outgoing

社交的

Meaning

Friendly and sociable; inclined to mix with others.

Example

He is an outgoing person who loves meeting new people.

彼は新しい人々と会うのが好きな社交的な人です。

C1 noun /ˈɒn.slɔːt/

onslaught

猛攻

Meaning

A fierce or destructive attack.

Example

The village faced an onslaught of enemy forces.

その村は敵軍の猛攻に直面しました。

C1 noun /ˈaʊtpoʊst/

outpost

前哨基地

Meaning

A small military camp or position at some distance from the main force, used especially as a guard.

Example

The soldiers were stationed at a remote outpost.

兵士たちは遠隔地の前哨基地に配置されました。

B2 verb /ɒpt/

opt

選ぶ

Meaning

to choose or decide to do something instead of something else

Example

Many students opt to study abroad for better opportunities.

多くの学生がより良い機会のために海外で学ぶことを選択します。

B2 noun/verb /ˈoʊvərˌdoʊs/

overdose

過剰摂取

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.

薬物の過剰摂取で病院に運ばれました。

C2 noun /əˈblɪkwɪti/

obliquity

歪み

Meaning

Deviation from moral or usual conduct; indirectness or lack of straightforwardness.

Example

The politician was criticized for the obliquity of his answers.

その政治家は、彼の答えの歪みについて批判された。

A2 adjective /ˈɒb.vi.əs/

Obvious

明白な; 簡単に理解できる

Meaning

easily perceived or understood; clear and apparent to the mind

Example

It was obvious that she was upset about something.

それは彼女が何かについて不満を抱えていることが明らかでした。

C2 verb /ˈɒsɪfaɪ/

ossify

骨化する

Meaning

to turn into bone or become rigid and inflexible

Example

With age, some tissues tend to ossify.

年を重ねると、一部の組織が骨化する傾向があります。

A2 noun /ˈɒbdʒɪkt/

object

物体

Meaning

a thing that can be seen and touched

Example

The table is an object in the room.

テーブルは部屋の中の物体です。

B2 noun /ˈɒt.ər/

Otter

カワウソ

Meaning

a mammal with webbed feet that lives near water and feeds on fish

Example

The playful otter swam gracefully in the river.

遊び好きなカワウソは川で優雅に泳いでいました。

B2 noun /ˈoʊ.vər ɡroʊθ/

Over growth

過剰成長

Meaning

excessive growth beyond normal size; too much development or expansion

Example

The overgrowth of weeds made the garden look untidy.

雑草の過剰な繁茂が庭を乱雑に見せた。

C2 noun /ˌɒpəˈrɛtə/

operetta

軽いオペラ

Meaning

a short opera with light and humorous themes

Example

The theater staged a famous operetta by Gilbert and Sullivan.

劇場はギルバートとサリヴァンの有名な軽いオペラを上演しました。

C1 verb /ˈɒfsɛt/

offset

相殺

Meaning

To counterbalance or compensate for something.

Example

The company's losses were offset by gains in other departments.

会社の損失は他の部門での利益で相殺されました。

C1 noun /ɒpˈtɒmətri/

optometry

視力検査学

Meaning

The practice or profession of examining the eyes and prescribing corrective lenses.

Example

She studied optometry at the university to become an eye specialist.

彼女は大学でオプトメトリーを学び、眼科専門医になりました。

C2 noun /ɑːlˈfækʃən/

olfaction

嗅覚

Meaning

The sense of smell; the process of detecting and perceiving odors.

Example

Dogs have a highly developed sense of olfaction.

犬は非常に発達した嗅覚を持っています。

C1 noun ɔːrˈdiːl

ordeal

厳しい試練

Meaning

A physical or mental painful experience that must be endured

Example

Surviving the wilderness was a tough ordeal for them.

荒野で生き残ることは彼らにとって大変な試練でした。

C1 adjective /ˈɒptɪk/

optic

視覚の

Meaning

Relating to the eye or vision.

Example

The optic nerve carries signals from the eye to the brain.

視神経は目から脳に信号を伝達します。

B1 noun /ˈɒbstəkəlz/

obstacles

障害物

Meaning

Things that block one's way or prevent or hinder progress.

Example

Obstacles in life can often lead to valuable lessons.

人生の障害物はしばしば貴重な教訓に繋がる。

C2 noun ˈɒpjʊləns

opulence

富裕

Meaning

Great wealth or luxuriousness.

Example

The opulence of the mansion was evident in its ornate furnishings.

豪邸の富裕さはその華やかな家具に明らかでした。

C1 noun /ˌoʊvərprəˈdʌkʃən/

overproduction

過剰生産

Meaning

The act of producing more of something than is needed or can be consumed.

Example

The economic crisis was caused by the overproduction of goods.

経済危機は商品の過剰生産によって引き起こされた。

C1 noun /ˈɔːrdɪnəns/

ordinance

条例

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.

市議会は公共公園での喫煙を禁じる条例を可決しました。

C1 adjective /oʊˈvɜːrt/

overt

公然

Meaning

Done or shown openly; not hidden or secret.

Example

There was an overt display of hostility between the rivals.

ライバルの間に公然とした敵意の表れがあった。

C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

直交

Meaning

at right angles; independent or unrelated

Example

In mathematics, two vectors are orthogonal if their dot product is zero.

数学では、2つのベクトルが直交している場合、そのドット積はゼロです。

B2 noun /ˈaʊt.kʌm/

Outcome

結果; 結末;

Meaning

the result or consequence of an action or situation; the final product

Example

The outcome of the election surprised everyone.

選挙の結果は皆を驚かせました。

B2 noun oʊˈbiː.sə.t̬i

obesity

肥満

Meaning

The condition of being grossly fat or overweight.

Example

Obesity increases the risk of diabetes and heart disease.

肥満は糖尿病と心臓病のリスクを高めます。

B1 verb /ˈɔːrɡənaɪz/

organize

整理する

Meaning

to arrange systematically; to plan and coordinate

Example

She organized a surprise party for her friend.

彼女は友達のためにサプライズパーティーを企画した。

C1 verb /əˈprɛs/

oppress

抑圧する

Meaning

to keep someone down by harsh and unfair use of authority; to suppress

Example

The dictator oppressed the people for decades.

独裁者は何十年も人々を抑圧した。

C1 adjective /əˈkʌlt/

occult

オカルト

Meaning

Relating to mysterious, supernatural, or magical powers and practices.

Example

She had always been fascinated by the occult and its hidden knowledge.

彼女は常にオカルトとその隠された知識に魅了されていた。

C1 adjective /ˌaʊt ən ˈaʊt/

out-and-out

完全な

Meaning

complete; absolute; used to emphasize something extreme

Example

The speech was an out-and-out lie.

そのスピーチは完全な嘘だった。

C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

Meaning

Excessively excited or aroused, overwhelmed by too much stimulus.

Example

Overstimulated minds can lead to burnout and decreased productivity.

A1 verb, adjective /oʊn/

own

所有する

Meaning

to possess something; belonging to oneself

Example

She owns a beautiful house in the city.

彼女は市内に美しい家を持っています。

C1 noun ˌoʊ.vɚˈɡreɪ.zɪŋ

overgrazing

過剰放牧

Meaning

The practice of allowing livestock to graze to the point of damaging vegetation.

Example

Overgrazing leads to soil erosion and loss of biodiversity.

過剰放牧は土壌の浸食と生物多様性の喪失を引き起こします。

B2 noun /ˈoʊvərpæs/

overpass

高架橋

Meaning

A bridge that carries one road or railway over another.

Example

The new overpass reduced traffic congestion in the city.

新しい高架橋は市内の交通渋滞を減らしました。

B2 noun /oʊˈbiː.di.əns/

Obedience

服従

Meaning

compliance with an order, request, or law; submission to authority

Example

Children should show obedience to their parents.

子供たちは両親に従うべきです。

A2 adjective /ɒd/

Odd

奇妙な; 異常な; 正常または予想されるものとは異なる

Meaning

strange; unusual; different from what is normal or expected

Example

That's an odd way to solve the problem.

それは問題を解決する奇妙な方法です。

B2 noun ˈɒksɪdʒən prəˈdʌkʃən

oxygen production

酸素生産

Meaning

The process of generating oxygen through photosynthesis or other means.

Example

Plants are vital for oxygen production and the maintenance of life.

植物は酸素の生産と生命の維持に不可欠です。

B2 adjective /ˈɔː.də.li/

Orderly

整然とした; 系統的な; 平和的な

Meaning

well-organized; systematic; peaceful

Example

Please keep your desk orderly and clean.

デスクを整然とした状態できれいに保ってください。

B2 adverb /ˈəʊvəli/

overly

過度に

Meaning

to an excessive degree or extent

Example

She was overly concerned about the results.

彼女は結果について過度に心配していた。

B2 adverb /ˈoʊpənli/

Openly

率直に; 公然と

Meaning

in a frank and honest way; without concealment; publicly

Example

She spoke openly about her struggles with mental health.

彼女はメンタルヘルスの問題についてオープンに話した。

C2 adjective /ˌɒbsəˈlɛsnt/

obsolescent

時代遅れの

Meaning

Becoming outdated or on the way to becoming obsolete.

Example

The obsolescent technology could not compete with modern devices.

時代遅れの技術は現代のデバイスには競争できなかった。

A2 adjective /əˈlɪmpɪk/

olympic

オリンピック

Meaning

related to the Olympic Games, a major international sporting event

Example

She trained hard to compete in the Olympic Games.

彼女はオリンピックに出場するために一生懸命トレーニングをしました。

C1 verb /ˌoʊvərˈʃædoʊ/

overshadow

覆い隠す

Meaning

to appear more important or significant than something else, reducing its impact

Example

The scandal overshadowed his achievements.

スキャンダルは彼の業績を影にしました。

C1 noun /ˌɑːpərˈtuːnɪst/

opportunist

機会主義者

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.

彼は常に自分の利益を第一に考える機会主義者として見られています。

B1 noun /ˈɔːfɪsər/

officer

警官

Meaning

a person in a position of authority, especially in law enforcement

Example

The officer gave him a ticket for speeding.

警官はスピード違反で彼にチケットを渡した。