C2 noun ˌɒbfəsˈkeɪʃən

obfuscation

難解化, 混乱

Meaning

The action of making something obscure, unclear, or unintelligible.

Example

The obfuscation of the data made it difficult to interpret.

データの難解化により、解釈が困難になりました。

B2 noun /ˈɔːɡənɪzəm/

organism

生物

Meaning

a living thing that has an organized structure and can grow and reproduce

Example

Every organism needs water to survive.

すべての生物は生き残るために水を必要とします。

C1 adjective/adverb /ˌɒfˈhænd/

offhand

軽率

Meaning

Without previous thought or preparation; casual and sometimes dismissive.

Example

She gave an offhand reply to his serious question.

彼女は彼の真剣な質問に対して、軽率な返答をした。

C2 noun /ˌoʊpəˈlɛsəns/

opalescence

オパレスセンス

Meaning

a milky or pearly appearance of a surface like that of an opal

Example

The pearl had a gentle opalescence under the light.

パールは光の下で優しいオパレスセンスを持っていました。

C2 verb /ˈɑːblɪˌɡeɪt/

obligate

強制する

Meaning

to bind legally or morally; to compel someone to do something

Example

The contract obligates the company to provide timely service.

契約は会社にタイムリーなサービスを提供することを義務付けます。

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。

A2 adjective /ˈaʊtdɔːr/

outdoor

アウトドア

Meaning

situated, existing, or done outside a building

Example

We planned an outdoor picnic for the weekend.

週末のためにアウトドアピクニックを計画しました。

A1 pronoun /aʊərz/

ours

私たちの

Meaning

belonging to or associated with us

Example

This victory is ours.

この勝利は私たちのものです。

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。

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。

B2 adjective /əˈfen.sɪv/

Offensive

攻撃的な; 侮辱的な; 攻撃的

Meaning

causing displeasure or resentment; insulting; aggressive

Example

His offensive remarks hurt everyone's feelings.

彼の攻撃的な発言は、全員の気持ちを傷つけました。

C2 noun /ˈɒksɪdənt/

occident

西洋

Meaning

The countries of the West, especially Europe and America.

Example

The Occident has a long history of philosophical thought.

西洋には長い哲学的思考の歴史があります。

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 noun /ˈɑb.lə.kwi/

Obloquy

厳しい批判または言葉による虐待; 公共の非難

Meaning

harsh criticism or verbal abuse; strong public condemnation

Example

The politician faced obloquy after the scandal.

政治家はスキャンダルの後、厳しい批判を受けました。

C1 noun /ˈɔɪntmənt/

ointment

軟膏

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.

医師は彼の腕のやけどのために軟膏を処方しました。

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。

C1 noun /ˌɑːsɪˈleɪʃən/

oscillation

振動

Meaning

The movement back and forth at a regular speed.

Example

The oscillation of the pendulum controls the clock.

振り子の振動が時計を制御します。

C2 noun /ˈaʊtˌrɪɡər/

outrigger

安定構造

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.

漁師はアウトリガー付きのカヌーをラグーンを越えて漕ぎました。

C2 verb ˈɑːb.fə.skeɪt

obfuscate

曖昧にする、混乱させる、隠す

Meaning

Render obscure, unclear, or unintelligible.

Example

Politicians often obfuscate facts to mislead people.

政治家はしばしば事実をわかりにくくして人々を誤導します。

C2 noun /oʊd/

ode

オード

Meaning

a lyrical poem, often expressing praise or strong emotions

Example

The poet wrote an ode to the beauty of nature.

詩人は自然の美に対するオードを書いた。

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。

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。

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。

B1 adjective /əˈfɪʃəl/

official

公式

Meaning

relating to or connected with an authority or public office

Example

He is the official spokesperson for the company.

彼は会社の公式なスポークスマンです。

C2 noun /ˈɑːbəlɪsk/

obelisk

オベリスク

Meaning

A tall, four-sided, narrow tapering monument with a pyramid-shaped top.

Example

The ancient Egyptians built obelisks to honor their gods.

古代エジプト人は神々を讃えるためにオベリスクを建てました。

B2 noun /ˈɔːrɡənaɪzər/

organizer

主催者

Meaning

a person who arranges or coordinates activities, events, or groups; a tool or item used to keep things in order

Example

She worked as the main organizer of the international conference.

彼女は国際会議の主要な主催者だった。

C1 adjective /ˌɒbsəˈliːt/

obsolete

時代遅れ

Meaning

No longer in use or out of date.

Example

Floppy disks are now completely obsolete.

フロッピーディスクは現在完全に時代遅れです。

C1 verb /aʊtˈlɪv/

outlive

より長生きする

Meaning

to live longer than someone or something else

Example

She outlived all her siblings.

彼女はすべての兄弟姉妹より長生きしました。

B2 noun /ˈoʊ.dər/

Odour

臭い

Meaning

a distinctive smell, especially an unpleasant one

Example

The odour of fresh bread filled the kitchen.

新鮮なパンの臭いがキッチンに広がった。

C1 adjective /ˈɒptɪkəl/

optical

光学的

Meaning

related to or used in seeing or sight

Example

The optical illusion fooled everyone at the exhibition.

その光学的錯覚は展示会で皆を騙した。

A1 conjunction /ɔːr/

or

または

Meaning

used to link alternatives

Example

You can have tea or coffee.

お茶かコーヒーをお選びいただけます。

B2 noun/verb /ˌoʊvərˈlæp/

overlap

Meaning

To extend over and cover partly; an area where things coincide.

Example

The two meetings overlap by an hour.

A2 noun /əˈlɪmpɪks/

olympics

オリンピック競技大会

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.

オリンピックは世界中のアスリートを一堂に集めます。

C1 noun /əbˈzɜːrvətɔːri/

observatory

天文台

Meaning

A building equipped for observing astronomical or meteorological events.

Example

The observatory is open to the public on weekends.

天文台は週末に一般公開されています。

C1 adjective /əbˈnɒkʃəs/

Obnoxious

不快な

Meaning

extremely unpleasant; offensive; annoying

Example

His obnoxious behavior at the party annoyed everyone.

彼のパーティーでの非常に不快な振る舞いは、皆を困らせた。

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 adjective /əˈblɪɡ.ə.tɔː.ri/

obligatory

義務的

Meaning

Required by a legal, moral, or other rule; compulsory.

Example

Wearing a seatbelt is obligatory in most countries.

ほとんどの国でシートベルトを着用することは義務です。

C1 noun /əbˈdʒɛktər/

objector

反対者

Meaning

a person who expresses opposition or disapproval to something

Example

The objector raised his concerns during the town meeting.

反対者は市議会の会議中に自分の懸念を表明しました。

C2 verb /ˈɑːbvieɪt/

obviate

排除する

Meaning

To remove a need or difficulty; to prevent or avoid something.

Example

This new system obviates the need for manual data entry.

この新しいシステムは手動データ入力の必要性を排除します。

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。

B1 noun /ˌɒpəˈreɪʃən/

operation

手術

Meaning

an act or process of functioning or operating

Example

The hospital performed a successful operation.

病院は成功した手術を行いました。

C1 noun /oʊˈveɪʃən/

ovation

拍手

Meaning

an enthusiastic show of approval, especially by clapping hands

Example

The actor received a standing ovation after his performance.

俳優はパフォーマンス後にスタンディングオベーションを受けました。

C1 noun /oʊˈeɪ.sɪs/

Oasis

オアシス

Meaning

a fertile spot in a desert where water is found; a pleasant refuge

Example

The travelers found an oasis after days in the desert.

旅行者たちは砂漠で数日後にオアシスを見つけました。

C1 verb /əˈfɪʃieɪt/

officiate

執り行う

Meaning

To perform official duties, especially in a ceremony or as a referee.

Example

The priest will officiate the wedding ceremony.

司祭が結婚式を司る。

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。

C2 noun /oʊˈbeɪsəns/

obeisance

敬意

Meaning

A gesture of respect such as a bow or curtsy.

Example

They bowed in obeisance to the king.

彼らは王に対して敬意を示すためにお辞儀をした。

A1 adjective /əʊˈkeɪ/

okay

大丈夫

Meaning

used to express agreement or acceptance

Example

It's okay to leave early today.

今日は早く帰るのは大丈夫です。

B1 noun əbˈdʒek.tɪv

objective

目標

Meaning

A thing aimed at or sought; a goal.

Example

The main objective is to test sustainability.

メインオブジェクティブは持続可能性をテストすることです。

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。

C1 adjective ˈɒk.sɪ.də.tɪv

oxidative

酸化に関連する

Meaning

Related to or caused by oxidation, especially cellular damage from free radicals.

Example

Excess stress can lead to oxidative damage in cells.

過度のストレスは細胞に酸化的な損傷を引き起こす可能性があります。

A2 verb /oʊˈbeɪ/

obey

従う

Meaning

to follow orders or instructions; to comply with rules

Example

Children should obey their parents and teachers.

子供たちは親と先生に従うべきです。

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。

B1 adjective /əˈrɪdʒ.ɪ.nəl/

Original

元の; 基本的な; 本物の

Meaning

first; fundamental; primary; authentic

Example

This is the original document, not a copy.

これはオリジナルの文書で、コピーではありません。

B2 verb /ˈɒkjʊpaɪ/

occupy

占める / 占有する / 居住する

Meaning

to take up space or time; to live or work in a place

Example

The new family will occupy the house next month.

新しい家族は来月その家に入居する予定です。

A2 noun /ˈoʊ.nər/

Owner

所有者

Meaning

a person who owns something; someone who has legal possession of property

Example

The owner of the restaurant greeted us warmly.

レストランの所有者は私たちを温かく迎え入れてくれました。

A2 noun /ˈʌv.ən/

Oven

オーブン

Meaning

an enclosed compartment used for heating, baking, or drying food

Example

She baked cookies in the oven for thirty minutes.

彼女はオーブンで三十分間クッキーを焼きました。

B2 verb /oʊˈmɪt/

omit

省略する

Meaning

to leave out or exclude; to fail to include something

Example

Please don't omit any important details from your report.

レポートから重要な詳細を省略しないでください。

A1 adverb /ˈɔːfən/

often

しばしば

Meaning

frequently, many times

Example

I often visit my grandparents on weekends.

私は週末にしばしば祖父母を訪れます。

C1 verb /əbˈsɛs/

obsess

Meaning

To preoccupy or fill the mind of someone continually and to an excessive degree.

Example

She tends to obsess over small details.

C1 noun ˌɒb.səˈlɛs.əns

obsolescence

陳腐化

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.

テクノロジーの急速な進歩は古いデバイスの陳腐化を引き起こします。

B2 adjective /ˈɔɪl.i/

Oily

油っぽい; 油で覆われた; 脂っこい

Meaning

covered with oil; containing oil; greasy

Example

Her oily skin needs special care.

彼女の油っぽい肌は特別なケアが必要です。

C1 verb /aʊtˈwɪt/

outwit

巧妙に出し抜く

Meaning

to defeat or gain an advantage over someone by being more clever or cunning

Example

The fox managed to outwit the hunters.

キツネは猟師たちを出し抜くことができました。

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。

C2 noun /ˌɑːpərˈtuːnɪzəm/

opportunism

機会主義

Meaning

The practice of taking advantage of opportunities regardless of principles or ethics.

Example

His decision was driven by opportunism, not values.

彼の決定は、価値観ではなくオポチュニズムに動機づけられていました。

C2 adjective /ˈɒsiəs/

osseous

骨のような

Meaning

consisting of or turned into bone; bony

Example

The fossil showed osseous structures of the ancient creature.

化石は古代の生物の骨のような構造を示しました。

C1 adjective /ˌaʊtˈlændɪʃ/

outlandish

奇妙

Meaning

Looking or sounding bizarre or unfamiliar; strange.

Example

He wore an outlandish costume to the festival.

彼は祭りに奇妙な衣装を着ていました。

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。

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。

C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

Meaning

Excessively excited or aroused, overwhelmed by too much stimulus.

Example

Overstimulated minds can lead to burnout and decreased productivity.

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。

C1 adjective /ˌoʊvərˈrɔt/

overwrought

興奮した / 過度に緊張した

Meaning

extremely agitated or nervous; excessively elaborate

Example

She was too overwrought to speak clearly after the accident.

事故後、彼女は興奮しすぎて、はっきりと話すことができなかった。

C1 noun /oʊθ/

Oath

誓い

Meaning

a solemn promise or declaration; a sworn statement

Example

The doctor took an oath to help patients.

医師は患者を助けることを誓いました。

B2 adjective ɔːrˈɡæn.ɪk

organic

有機

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.

有機農業は土壌の健康を改善し、汚染を減少させます。

B2 verb /ˌoʊvərˈtɜrn/

overturn

覆す / 判決を覆す

Meaning

to turn something upside down or to reverse a decision or judgment

Example

The court decided to overturn the previous ruling.

裁判所は前回の判決を覆すことに決めました。

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。

C1 adjective /ˌoʊvərˈbɛrɪŋ/

overbearing

押しつけがましい

Meaning

unpleasantly or arrogantly domineering

Example

His overbearing attitude made everyone uncomfortable.

彼の押しつけがましい態度は、みんなを不快にさせた。

B2 noun /ɔːˈræŋ.ʊˌtæŋ/

Orang-Outang

オランウータン

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.

オランウータンは森の樹冠を優雅に渡ります。

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。

C2 noun /əbˈstɛtrɪks/

obstetrics

産科

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.

彼女は産科を学んで、出産専門医になろうとしている。

C2 adjective /ˈɒf.biːt/

offbeat

風変わり

Meaning

Unusual, unconventional, or different from the norm.

Example

She has a very offbeat sense of humor.

彼女はとても風変わりなユーモアを持っています。

C1 noun /ˈɒptɪks/

optics

光学

Meaning

The branch of physics dealing with light and vision.

Example

She studied optics to understand how lenses work.

彼女はレンズがどのように機能するかを理解するために光学を学びました。

B2 noun /ˈaʊt.saɪ.dər/

Out-sider

アウトサイダー

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.

アウトサイダーとして、彼は彼らの伝統を理解するのが難しいと感じました。

B2 verb /əˈblaɪdʒ/

oblige

義務付ける

Meaning

to compel or require someone to do something; to help or do a favor

Example

I would be happy to oblige you with the information you need.

必要な情報を提供してお手伝いできれば嬉しいです。

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。

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。

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。

C2 noun /ˈəʊpəs/

opus

創作作品

Meaning

A creative work, especially a large and important piece of music or art.

Example

The composer considered the symphony his greatest opus.

作曲家は交響曲を自分の最も偉大な創作作品と見なしていました。

B2 noun /ˈɒpəreɪtər/

operator

オペレーター

Meaning

a person who operates equipment, a business, or controls something

Example

The machine operator ensured that everything ran smoothly.

機械オペレーターは、すべてがスムーズに動作することを確認しました。

B2 noun, verb /ˈaʊtlɔː/

outlaw

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.

C1 adjective /ˌaʊt əv ðə ˈweɪ/

out-of-the-way

人里離れた場所

Meaning

remote or unusual; not in a convenient or usual location

Example

They stayed in an out-of-the-way village.

彼らは人里離れた村に滞在しました。

B2 noun /ˈaʊt.laɪn/

Outline

アウトライン; 概要; 計画

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.

先生はコースのアウトラインを提供しました。

C1 noun /ˈɔːrθədɑːksi/

orthodoxy

正統

Meaning

traditional or generally accepted beliefs and practices

Example

The religious leader defended the orthodoxy of the faith.

宗教指導者は信仰の正統性を守った。

C2 noun /ˈoʊ.kəm/

oakum

古いロープの繊維

Meaning

loose fibers obtained by untwisting old ropes, used for caulking ships

Example

The shipbuilders used oakum to seal the gaps in the wooden planks.

船大工たちは木の板の隙間を塞ぐためにオーカムを使いました。

B1 adverb /ˈʌðərwaɪz/

Otherwise

さもないと; 他の方法で

Meaning

in a different way; if not; or else; apart from that

Example

Study hard, otherwise you will fail the exam.

一生懸命勉強しなさい、さもないと試験に落ちます。

C2 noun /ˈɔɪl.mən/

Oilman

石油業者

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.

オイルマンは砂漠で新しい油田を発見した。

C1 noun ˌɒp.tɪ.maɪˈzeɪ.ʃən

optimization

最適化

Meaning

Improving processes to increase performance and efficiency.

Example

SEO optimization helps websites rank higher on search engines.

SEO最適化はウェブサイトが検索エンジンでより高いランクを獲得するのを助けます。

A2 noun /ˈɒpərə/

opera

オペラ

Meaning

a dramatic performance in which the actors sing most of their lines

Example

We watched a beautiful opera at the theater last night.

昨晩、劇場で美しいオペラを観ました。

B2 noun /əbˈdʒek.ʃən/

Objection

異議; 反対; 抗議;

Meaning

an expression of disagreement or disapproval; a reason for disagreeing

Example

The lawyer raised an objection during the trial.

弁護士は裁判中に異議を唱えました。

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。

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。

A2 adjective /ˈɑp.ə.zɪt/

Opposite

反対の; 完全に異なる; 向かい合っている; 逆の;

Meaning

Contrary; completely different; facing each other; reverse;

Example

They have opposite views on politics but remain good friends.

彼らは政治に関して対立した見解を持っていますが、良い友達のままです。

B2 noun ˈəʊ.və.hed

overhead

間接費

Meaning

Ongoing business expenses not directly attributable to creating a product or service.

Example

The company reduced its overhead to increase profits.

会社は利益を増やすために間接費を削減した。

A1 noun /ɒkˈtoʊbər/

october

10月

Meaning

the tenth month of the year in the Gregorian calendar

Example

The weather becomes cooler in October.

10月になると天気が涼しくなります。

C1 adjective /ɒˈstɛnsəbl/

ostensible

見せかけの

Meaning

stated or appearing to be true, but not necessarily so

Example

His ostensible reason for leaving was illness, but many doubted it.

彼の出発の見せかけの理由は病気だったが、多くの人がそれを疑っていた。

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。

C1 verb ˈɔːr.kɪ.streɪt

orchestrate

調整する

Meaning

To plan or coordinate the elements of (a situation) to produce a desired effect, especially surreptitiously.

Example

He skillfully orchestrated the entire event.

彼は巧妙に全体のイベントを調整しました。

C1 noun /ɒpˈtɒmɪtrɪst/

optometrist

オプトメトリスト

Meaning

A healthcare professional who examines eyes and prescribes corrective lenses.

Example

The optometrist prescribed new glasses for her.

オプトメトリストは彼女に新しい眼鏡を処方しました。

B1 noun /ˈɑp.ʃən/

Option

オプション

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.

自宅またはオフィスから仕事をするオプションがあります。

B2 adjective /ˌoʊvərˈwɛlmɪŋ/

overwhelming

圧倒的

Meaning

Very intense; overpowering.

Example

Large tasks can feel overwhelming.

大きな仕事は圧倒的に感じることがあります。

C1 noun /oʊˈmɪʃ.ən/

Omission

省略; 除外

Meaning

the action of excluding or leaving out someone or something; a failure to include

Example

The omission of his name from the list was intentional.

リストから彼の名前を省略することは意図的でした。

B1 verb অকার্স

occurs

起こる

Meaning

Happens or takes place, especially as a result of something.

Example

Snowfall occurs in regions with freezing temperatures.

雪は氷点下の温度を持つ地域で起こります。

C2 adjective /ɒmˈnɪʃ.ənt/

Omniscient

全知の

Meaning

having complete knowledge; all-knowing

Example

The narrator in the novel appears to be omniscient, knowing every character's thoughts.

小説の語り手は全知であるかのようで、すべての登場人物の思考を知っている。

C2 noun /ˈoʊɡər/

ogre

Meaning

A mythical monster, often depicted as large, hideous, and cruel; metaphorically, a cruel or terrifying person.

Example

The villagers feared the ogre who lived in the dark forest.

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。

B2 adjective /aʊtˈstændɪŋ/

outstanding

優れた

Meaning

extremely good or impressive; not yet resolved or paid

Example

She received an award for her outstanding performance.

彼女は優れたパフォーマンスで賞を受賞しました。

B2 noun /əbˈsɛʃən/

obsession

執着

Meaning

An idea, thought, or concern that continually preoccupies or intrudes on a person's mind.

Example

His obsession with success drove him to work day and night.

成功への執着が彼を昼夜働かせた。

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 /ˈɒs.trɪtʃ/

Ostrich

ダチョウ

Meaning

a large flightless bird native to Africa with long legs and neck

Example

The ostrich is the world's largest bird.

ダチョウは世界最大の鳥です。

B2 noun ˈəʊnəʃɪp

ownership

所有権

Meaning

The act, state, or right of possessing something; legal title to something.

Example

Ownership of resources was crucial.

資源の所有権は重要でした。

C2 adjective /ˈɔːrəˌtʌnd/

orotund

豊かで明確な声

Meaning

full, rich, and clear in sound; pompous in style

Example

The actor's orotund voice filled the theater.

俳優の豊かな声が劇場に響き渡った。

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。