Under wear
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A2 noun /ˈʌndərwɛr/

Under wear

下着
Meaning
clothing worn under other clothes, next to the skin
Example
She bought new underwear from the department store.
彼女はデパートで新しい下着を買いました。
C1 adjective /ˌʌndərˈsteɪtɪd/

understated

控えめな
Meaning
Presented in a subtle and restrained way.
Example
She wore an elegant but understated dress.
彼女はエレガントで控えめなドレスを着ていた。
B2 verb /ʌnˈfəʊld/

unfold

広げるまたは開く
Meaning
to open or spread out something that was folded; to gradually reveal or develop
Example
She unfolded the letter carefully.
彼女は手紙を慎重に広げました。
B1 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

下に、下側に
Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
鍵は紙の山の下に隠されていました。
B2 noun /ˈʌndərkləʊðz/

underclothes

下着
Meaning
Clothing worn beneath outer clothes, such as underwear or lingerie
Example
He folded his underclothes neatly before packing them.
彼は下着を丁寧にたたんでから詰めた。
A1 pronoun /ʌs/

us

私たち
Meaning
used to refer to the speaker and one or more other people as the object of a verb or preposition
Example
She gave us a gift.
彼女は私たちに贈り物をくれました。
C1 adjective /ʌnˈmaɪndfəl/

Unmindful

無頓着な; 注意しない;
Meaning
not paying attention; careless; heedless
Example
She was unmindful of the danger around her.
彼女は周りの危険に気づいていませんでした。
B1 adjective /ʌnˈfeər/

Unfair

不公平; 不正;
Meaning
not right or just; treating people in a way that favors some over others
Example
It's unfair to blame her for something she didn't do.
それは彼女がやっていないことを責めるのは不公平です。
B2 adjective /ʌnˈfeɪv(ə)rəbəl/

unfavorable

不利な
Meaning
not beneficial or advantageous; showing disapproval or opposition
Example
The proposal received an unfavorable response from the committee.
その提案は委員会から不利な反応を受けました。
B1 verb /ʌnˈlɒk/

unlock

解錠する
Meaning
to open something that is locked; to make something accessible or available
Example
She used the key to unlock the door.
彼女は鍵を使ってドアを解錠した。
C1 adjective /ʌnˈbraɪdld/

unbridled

抑制のない
Meaning
Uncontrolled and unrestrained.
Example
The protesters showed unbridled enthusiasm for change.
抗議者は変革に対して抑えきれない熱意を示しました。
C1 adjective /ˌʌnbɪˈliːvɪŋ/

unbelieving

信じない
Meaning
Not willing or able to believe; skeptical or doubtful
Example
She gave him an unbelieving look when he claimed to have met a celebrity.
彼が有名人に会ったと主張したとき、彼女は彼に信じない目を向けた。
B2 adjective /ʌnˈraɪp/

Unripe

未熟
Meaning
not fully developed or matured; not ready to be eaten
Example
The unripe bananas will turn yellow in a few days.
未熟なバナナは数日後に黄色くなります。
C1 adjective /ʌnˈsəʊʃəl/

unsocial

非社交的な
Meaning
not enjoying the company of others; avoiding social interaction; contrary to social norms
Example
He prefers unsocial hours so he can work alone without interruptions.
彼は一人で働くために非社交的な時間を好む。
C1 noun /ˈʌlsər/

ulcer

Meaning
a sore on the skin or a mucous membrane that does not heal easily
Example
The doctor prescribed medicine to treat the stomach ulcer.
C2 noun /ˈjuːʒəri/

usury

高利貸し
Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
法律は高利貸しを厳しく禁止しています。
B2 noun /ˈʌpˌkiːp/

up-keep

維持管理
Meaning
The process or cost of maintaining something in good condition.
Example
The upkeep of the old house is very expensive.
古い家の維持管理は非常に高価です。
C2 adjective /ˌʌnəˈʃʊəd/

unassured

自信のない
Meaning
Lacking confidence or certainty.
Example
She gave an unassured answer during the interview.
彼女は面接で自信のない答えをしました。
A2 adjective /ʌnˈlʌki/

Unlucky

不運; ラッキーでない
Meaning
having bad luck; unfortunate
Example
He was unlucky to miss the winning shot.
彼は勝つシュートを外して不運だった。
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

非常に面白い
Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
コメディアンのジョークは絶対に非常に面白かったです。
C1 noun /ˈʌndərˌstʌdi/

understudy

アンダースタディ
Meaning
An actor who learns another's role to act as a replacement if needed.
Example
The understudy performed when the lead actor fell ill.
主役の俳優が病気になったとき、アンダースタディが演じました。
C2 adjective /ɜːrˈbeɪn/

urbane

洗練された
Meaning
showing polished manners, refinement, and sophistication
Example
He was an urbane gentleman who charmed everyone at the party.
彼はパーティーでみんなを魅了した洗練された紳士だった。
C1 adjective /ʌnˈɡɑː.dɪd/

Unguarded

無防備な
Meaning
not protected or defended; careless about revealing private thoughts or information
Example
In an unguarded moment, she revealed her true feelings about the project.
油断した瞬間、彼女はそのプロジェクトについての本当の気持ちを明かした。
A1 adjective /ˈjuːs.fəl/

Useful

役に立つ; 実用的な
Meaning
having a beneficial purpose; practical
Example
This tool is very useful for fixing problems.
このツールは問題を解決するために非常に役立ちます。
B2 adjective /ʌnˈriːzənəbəl/

unreasonable

理不尽な
Meaning
not guided by reason or fairness; excessive or extreme beyond what is acceptable
Example
The manager made an unreasonable demand that no one could realistically meet.
マネージャーは理不尽な要求をした。
C1 adjective /ˌʌndərɪkˈspoʊzd/

underexposed

露出不足、無視された
Meaning
insufficiently exposed to light (in photography) or not given enough attention
Example
The photo was underexposed and looked too dark.
写真は露出不足で、暗すぎて見えました。
C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

魅力的でない
Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
彼は魅力的でない外見にもかかわらず、非常に親切で賢かった。
B2 adjective /ʌnˈiːvən/

Uneven

不均一; 凹凸のある
Meaning
not level or smooth; not regular or consistent
Example
The road was uneven and full of potholes.
その道は不均一で、穴だらけだった。
B2 adjective /ʌn.rɪˈleɪ.tɪd/

Unrelated

無関係な; 関連していない
Meaning
having no connection or relationship; not connected by family ties
Example
The two incidents were completely unrelated to each other.
二つの出来事は完全に無関係だった。
B2 adjective /ˌʌnˈkɔːrdɪneɪtɪd/

uncoordinated

不器用; 協調性のない
Meaning
lacking coordination, not well-organized or clumsy in movement
Example
His movements were uncoordinated, making him prone to accidents.
彼の動きは不器用で、事故を起こしやすかった。
B2 adjective /ˈʌpˌhɪl/

Uphill

困難な; 大きな努力が必要な; 上向きの傾斜
Meaning
difficult; requiring great effort; sloping upward
Example
Learning a new language can be an uphill battle.
新しい言語を学ぶことは困難な戦いである可能性があります。
C1 adjective /ʌnˈɒnəd/

unhonoured

敬われない
Meaning
not respected or given the recognition that is deserved; treated without honor
Example
He felt unhonoured after his years of service were ignored.
長年の奉仕が無視され、彼は敬われないと感じた。
C2 verb /ʌnˈkaʊtʃ/

uncouch

ソファから取り除く（稀な意味）
Meaning
to remove from a couch or to release from being laid down (rare/archaic usage)
Example
The surgeon attempted to uncouch the cataract.
外科医は白内障を取り除こうとしました。
B2 adjective /ʌnˈsuːtəbl/

Unsuitable

不適切; 不適当
Meaning
not fitting or appropriate for a particular purpose or situation
Example
This formal dress is unsuitable for a casual beach party.
このフォーマルなドレスはカジュアルなビーチパーティには不適切です。
B2 adjective /ˈʌpˌraɪt/

Upright

正直で道徳的に正しい; 垂直または立っている位置
Meaning
honest and morally correct; vertical or erect in position
Example
She is known for being an upright and honest businesswoman.
彼女は正直で正しいビジネスウーマンとして知られています。
B2 adjective /ʌnˈberəbəl/

Unbearable

耐えられない
Meaning
too painful, annoying, or unpleasant to tolerate; impossible to endure
Example
The heat in the desert was unbearable.
砂漠の暑さは耐えられなかった。
B1 noun /ʌnˈhæp.i.nəs/

unhappiness

不幸
Meaning
the state of being unhappy; sadness or dissatisfaction
Example
Her constant unhappiness affected everyone around her.
彼女の絶え間ない不幸は周囲の人々に影響を与えた。
B1 adjective /ʌnˈjuzd/

Unused

未使用の; 使われていない
Meaning
not being used; not having been used before
Example
There are many unused rooms in this old mansion.
この古い館には未使用の部屋がたくさんあります。
C2 adjective /ʌnˈsʌlid/

unsullied

汚れのない
Meaning
not spoiled or made impure; perfectly clean or pure
Example
His reputation remained unsullied despite the accusations.
彼の評判は告発にもかかわらず汚れのないままでした。
A1 adverb /ʌp/

up

上
Meaning
towards a higher position or level
Example
He climbed up the ladder quickly.
彼はすばやくはしごを上った。
B1 adjective /ʌnˈlaɪk/

Unlike

異なる; 類似していない
Meaning
different from; not similar to
Example
Unlike his brother, he prefers quiet activities.
彼の兄とは異なり、彼は静かな活動を好む。
C1 noun ˌʌndərˈprɪvəlɪdʒd ɡruːps

underprivileged groups

恵まれないグループ
Meaning
Groups of people who lack basic necessities or advantages that are available to other members of society.
Example
Underprivileged groups benefit from social initiatives.
恵まれないグループは社会的なイニシアティブから利益を得ます。
B1 adjective /ˌʌnsəkˈsesfl/

Unsuccessful

失敗した; 成功しなかった;
Meaning
not achieving desired aims or results; failing to accomplish a purpose
Example
His unsuccessful attempt to climb the mountain left him disappointed.
彼の失敗した山登りの試みは彼を失望させた。
B2 noun /ˌʌnəˌveɪləˈbɪləti/

unavailability

利用不可
Meaning
The state of being not available or not accessible.
Example
The unavailability of the manager caused a delay in the project.
マネージャーの不在がプロジェクトの遅延を引き起こした。
C2 noun /ˈjuːnɪvəˌlɛns/

univalence

単価性
Meaning
The state of having a single valence or combining power, especially in chemistry.
Example
Hydrogen is characterized by its univalence in chemical reactions.
水素は化学反応においてその単価性によって特徴づけられています。
B1 adjective /ʌnˈklɪər/

unclear

不明確
Meaning
not easy to understand; vague or ambiguous
Example
The instructions were unclear, so I asked for clarification.
指示が不明確だったので、私は説明を求めました。
C1 adjective /ʌnˈspiːkəbl/

unspeakable

言葉では表現できない
Meaning
too bad or shocking to be expressed in words
Example
The survivors endured unspeakable horrors during the war.
生存者は戦争中に言葉では表現できない恐怖に耐えました。
C1 adjective /ʌnˈtoʊld/

Untold

無数の; 無限の
Meaning
very great in amount or degree; countless; immeasurable
Example
The earthquake caused untold damage to the city.
地震は都市に無数の損害を与えました。
C1 adjective /ˌʌn.əˈdʌl.tə.reɪ.tɪd/

Unadulterated

純粋
Meaning
not mixed or diluted with any different or extra elements; pure
Example
She felt unadulterated joy when she heard the news.
彼女はそのニュースを聞いたとき、純粋な喜びを感じました。
C2 noun /ˌjuːnɪˈtɛəriən/

unitarian

ユニタリアン
Meaning
A person who believes that God exists as one entity rather than as a Trinity; a member of a religious denomination that emphasizes individual freedom of belief.
Example
The Unitarian church is known for its inclusive and open-minded approach.
ユニタリアン教会は、その包括的で開かれた考え方で知られています。
A2 verb /ʌpˈdeɪt/

update

更新
Meaning
to make something more modern or current; to provide new information
Example
Please update your software regularly.
定期的にソフトウェアを更新してください。
C1 adjective /ʌnˈsɪvəl/

Uncivil

無礼な; 不作法な;
Meaning
not polite or courteous; rude and discourteous in behavior
Example
His uncivil remarks during the meeting offended everyone present.
会議中の彼の無礼な発言は、出席者全員を不快にさせた。
B2 adjective /ʌnˌkənˈfɜːmd/

Unconfirmed

未確認; 未検証;
Meaning
not confirmed as true or definite; not verified or substantiated
Example
The report remains unconfirmed until we receive official verification.
報告書は公式の確認が得られるまで未確認のままです。
C2 noun juːˈbɪkwɪti

ubiquity

遍在性
Meaning
The fact of appearing everywhere or of being very common.
Example
The ubiquity of smartphones has transformed communication.
スマートフォンの遍在性は、コミュニケーションを変革しました。
B1 adjective /ʌnˈwel/

Unwell

体調不良; 病気
Meaning
not in good health; feeling sick or ill
Example
She has been feeling unwell since yesterday.
彼女は昨日から体調が悪い。
C1 adjective /ʌnˈmænɪdʒəbəl/

Unmanageable

管理できない; 手に負えない
Meaning
difficult or impossible to control or handle
Example
The large class became unmanageable without proper supervision.
適切な監視がなければ、大きなクラスは管理できなくなった。
B2 adjective /ʌnˈfɪt/

Unfit

不適格; 不適当;
Meaning
not in good physical condition; unsuitable or inappropriate
Example
He was declared unfit for military service due to his poor health.
彼は健康状態が悪いため、軍務には不適格と宣告されました。
B2 noun /ʌnˈkaɪndnəs/

unkindness

不親切
Meaning
lack of kindness; cruel or inconsiderate behavior
Example
His unkindness hurt her feelings deeply.
彼の不親切は彼女の気持ちを深く傷つけた。
C2 verb /ʌnˈjoʊk/

unyoke

束縛から解放する
Meaning
To release from a yoke or to free from restraint or obligation.
Example
The farmer unyoked the oxen after a long day of work.
農夫は長い労働の後に牛の首輪を外した。
C1 adjective /ʌnˈtaɪmli/

Untimely

不適切なタイミングで
Meaning
happening at an inappropriate or inconvenient time; premature
Example
His untimely death at the age of thirty shocked everyone.
彼の不適切なタイミングでの死は30歳でみんなを驚かせた。
C1 adjective /ʌnˈkɛmpt/

unkempt

だらしない
Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
彼は一晩外で寝た後、だらしなく見えた。
C2 adjective /ˌʌltrəˈmʌndeɪn/

ultramundane

超越的
Meaning
Relating to things beyond the physical world; supernatural or transcendental.
Example
Philosophers often discuss ultramundane realities beyond human perception.
哲学者たちはしばしば人間の知覚を超えたウルトラムンデインな現実について議論します。
C1 noun /ˌʌnprɪˈdɪktəˌbɪləti/

unpredictability

予測不可能性
Meaning
The quality of being impossible to predict or anticipate.
Example
The unpredictability of the weather made the trip uncertain.
天気の予測不可能性は旅行を不確実にした。
B2 adjective /ˈjuː.nɪ.faɪd/

unified

統一された
Meaning
Made into a whole or joined together.
Example
A unified approach fosters better outcomes.
統一されたアプローチはより良い結果を促進します。
C2 verb /ˌʌn.dɪˈsiːv/

undeceive

誤解を解く
Meaning
To free someone from a misconception or false belief.
Example
She tried to undeceive him about the false rumors.
彼女は嘘の噂について彼を誤解を解こうとしました。
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

過少に請求する
Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
店主は私に食料品を過少に請求しました。
A1 verb /ˌʌndərˈstænd/

understand

理解する
Meaning
to know the meaning of something; to comprehend
Example
Do you understand the instructions?
指示が理解できますか?
C2 adjective /ˌʌnɪmˈpiːtʃəbl/

unimpeachable

非難の余地がない
Meaning
Not able to be doubted, questioned, or criticized; completely trustworthy.
Example
She is known for her unimpeachable honesty.
彼女はその非難の余地がない誠実さで知られています。
B2 adverb /ʌnˈfɛərli/

unfairly

不公平に
Meaning
In a manner that is not just, reasonable, or impartial
Example
He was treated unfairly by the committee.
彼は委員会によって不公平に扱われた。
B1 adjective ʌnˈplænd

unplanned

計画外の
Meaning
Not planned or arranged in advance; happening spontaneously without preparation.
Example
Unplanned urbanization contributes to environmental issues.
計画外の都市化は環境問題に寄与する。
B1 adjective /ˌʌndərˈstændəbl/

understandable

理解できる
Meaning
Able to be understood; reasonable or justifiable.
Example
Her reaction was understandable given the situation.
その反応は状況を考慮すると理解できるものでした。
C1 adjective /ʌnˈsɪvəlaɪzd/

Uncivilized

未開の; 野蛮な;
Meaning
not developed in terms of civilization; lacking social organization and culture; barbarous
Example
The explorers encountered an uncivilized tribe deep in the Amazon rainforest.
探検家たちはアマゾンの雨林の奥深くで未開の部族に出会った。
C2 verb /ˈʌndərˌraɪt/

underwrite

Meaning
To guarantee financial support, especially by agreeing to cover losses or risks; in insurance, to assess and accept risks.
Example
The bank agreed to underwrite the company's new bond issue.
B2 adjective /ʌnˈkɒmən/

uncommon

珍しい
Meaning
rare, unusual, or remarkable
Example
It is uncommon to see snow in this region.
この地域で雪を見るのは珍しい。
C1 noun /ˈʌndərdɒɡ/

underdog

アンダードッグ
Meaning
a competitor thought to have little chance of winning; a weaker party in a contest
Example
The underdog team surprised everyone by winning the championship.
アンダードッグのチームはチャンピオンシップを勝ち取って、皆を驚かせました。
C2 adjective /ˌʌn.rɪˈdʒɛn.ər.ət/

unregenerate

頑固
Meaning
Not reformed or showing no signs of change; stubbornly refusing to reform or repent.
Example
He remained an unregenerate opponent of progress.
彼は進歩の頑固な反対者であり続けた。
C2 adjective /ʌnˈʌtərəbl/

unutterable

言葉では表現できない
Meaning
Too great, intense, or awful to be expressed or described in words.
Example
She was filled with unutterable joy at the news of her success.
彼女は成功の知らせを聞いたとき、言葉では言い表せないほどの喜びで満たされていました。
C1 adjective /ʌnˈkɒm.prə.maɪ.zɪŋ/

Uncompromising

譲歩しない, 妥協しない
Meaning
unwilling to change one's views or to agree about something; showing an unwillingness to make concessions to others
Example
He was uncompromising in his demand for a full apology.
彼は完全な謝罪を要求する際に譲歩しませんでした。
B1 adjective /ʌnˈseɪf/

Unsafe

危険な; 危ない;
Meaning
involving or causing danger or risk; not protected from harm
Example
It is unsafe to walk alone in this neighborhood at night.
この地域では夜間に一人で歩くのは危険です。
B2 adjective /ʌnˈwaɪz/

unwise

賢明でない
Meaning
Showing poor judgment; not sensible or prudent.
Example
It would be unwise to invest all your money in one company.
すべてのお金を1つの会社に投資するのは賢明でないことです。
C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
B1 adjective /ʌnˈkaɪnd/

Unkind

無愛想; 不親切
Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
彼が彼女の外見をからかうのは不親切だった。
B1 noun /juːˈten.səlz/

Utensils

食器
Meaning
tools or implements used for cooking, eating, or serving food
Example
Please wash all the cooking utensils after preparing dinner.
ディナーを準備した後、すべての料理用具を洗ってください。
C2 noun /ˈʌmbrɪdʒ/

umbrage

怒り, 不満
Meaning
A feeling of resentment or offense.
Example
She took umbrage at his rude remark.
彼女は彼の無礼な発言に怒りを感じた。
B2 adjective /ˌʌnəˈvɔɪdəbəl/

Unavoidable

避けられない; 避けることができない; 必然的な
Meaning
cannot be avoided; certain to happen; inevitable
Example
The meeting is unavoidable, so we must attend.
その会議は避けられないので、出席しなければなりません。
C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

雇用不適格
Meaning
Not able to be employed; lacking the skills or qualities necessary for employment
Example
Due to his criminal record, he was considered unemployable in most companies.
彼の犯罪歴のため、ほとんどの会社で雇用不適格と見なされた。
B1 adjective /ʌnˈʃʊr/

unsure

不確かな
Meaning
not certain or confident; feeling doubt
Example
She felt unsure about the decision.
彼女はその決定について不確かだった。
B1 adjective /ʌnˈsɜːrtən/

Uncertain

不確か
Meaning
not able to be relied on; not known or definite; not having reliable knowledge
Example
I am uncertain about my future career plans.
私は自分の将来のキャリア計画に不確かさを感じています。
B1 adjective /ʌnɪmˈplɔɪd/

Unemployed

失業中
Meaning
without a job; not having paid work
Example
He has been unemployed for six months now.
彼はすでに6ヶ月間失業しています。
A2 adjective /ˈjuːs.ləs/

Useless

無駄
Meaning
having no beneficial purpose; not useful
Example
This broken computer is completely useless.
この壊れたコンピュータは完全に役に立たない。
C1 adjective /ʌnˈtʃælɪndʒd/

Unchallenged

挑戦されていない; 反対なしに受け入れられた; ライバルなし
Meaning
not disputed or questioned; accepted without opposition; having no rival
Example
He remained the unchallenged champion for five years.
彼は5年間、挑戦されていないチャンピオンであり続けました。
C1 verb /ˌʌndərˈsteɪt/

understate

過小評価する
Meaning
To describe something as being less important or serious than it really is.
Example
He tends to understate his achievements.
彼は自分の業績を過小評価する傾向があります。
B1 adjective /ʌnˈtru/

Untrue

嘘の; 間違った
Meaning
not true; false; incorrect
Example
His statement about the incident was completely untrue.
彼の事件に関する声明は完全に嘘でした。
C2 adjective /ˈʌndjʊləs/

undulous

波打つ
Meaning
Having a wavy surface or form.
Example
The artist painted the undulous sea at sunset.
アーティストは夕日に照らされた波打つ海を描きました。
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

不適切
Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
彼の無礼な態度はリーダーとして不適切だった。
C1 verb /ʌpˈruːt/

uproot

引き抜く
Meaning
To pull something out of the ground; to remove or displace completely.
Example
They uprooted the old tree from the garden.
彼らは庭から古い木を引き抜いた。
C2 adjective /ʌnˈblʌʃɪŋ/

Unblushing

恥知らずな; 図々しい
Meaning
showing no shame or embarrassment; boldly shameless
Example
He told the unblushing lie without any hesitation.
彼はためらうことなく無恥な嘘をついた。
C1 verb /ʌnˈnɜːrv/

unnerve

自信を失う
Meaning
to make someone lose confidence, courage, or composure
Example
The hostile questions began to unnerve the witness.
敵意のある質問が証人を動揺させ始めた。
B2 adjective /ʌnˌkənˈdɪʃ.ən.əl/

Unconditional

無条件の
Meaning
not subject to any conditions; complete and absolute
Example
She offered her unconditional support to her friend in need.
彼女は困っている友人に無条件のサポートを提供しました。
C1 noun /ʌnɪmˈpɔːrtəns/

unimportance

重要でなさ
Meaning
the state or quality of being insignificant or not important
Example
He dismissed the issue with a sense of unimportance.
彼はその問題を重要でないものとして無視した。
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

未教育; 教育を受けていない
Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
多くの未教育の労働者は、良い給料の仕事を見つけるのに苦労しています。
A2 adjective /ˈjuːʒəl/

usual

通常
Meaning
habitually or typically occurring or done
Example
It’s our usual meeting spot.
これは私たちの通常の会議場所です。
C1 noun /ˌʌnbɪˈliːf/

Unbelief

不信
Meaning
lack of religious belief; skepticism or doubt
Example
His unbelief in the supernatural made him a skeptic.
超自然に対する彼の不信は彼を懐疑的にしました。
C1 verb /ʌnˈkɔrk/

uncork

コルクを抜く
Meaning
To remove the cork from a bottle; to open a bottle, especially of wine
Example
He uncorked the wine and poured a glass for everyone.
彼はワインのコルクを抜き、皆にグラスを注いだ。
B1 adjective /ˈjuːnɪfɔːrm/

Uniform

制服
Meaning
consistent; identical; standardized
Example
All students must wear a uniform to school.
すべての学生は学校で制服を着なければなりません。
C2 adjective /ʌnˈflæpəbəl/

unflappable

冷静沈着
Meaning
calm and composed, especially in difficult situations
Example
Despite the crisis, he remained unflappable and confident.
危機にもかかわらず、彼は冷静沈着で自信に満ちていた。
B2 adverb juːˈnæn.ɪ.məs.li

unanimously

全会一致で
Meaning
With the agreement of all people involved; without opposition.
Example
The proposal was unanimously accepted.
提案は全会一致で受け入れられました。
C1 adjective /ˌʌnrɪˈfaɪnd/

unrefined

未精製の
Meaning
not processed or purified; lacking polish or sophistication
Example
The unrefined oil must be processed before it can be used as fuel.
未精製の石油は燃料として使う前に処理する必要がある。
B2 adjective /ˌʌnkənˈvɛnʃənl/

unconventional

型破りの
Meaning
not based on or conforming to what is generally done or believed
Example
Her unconventional approach to teaching inspired her students to think creatively.
彼女の型破りの教育アプローチは、生徒たちに創造的に考えるよう促しました。
C1 noun /juːˈtoʊpiə/

utopia

ユートピア
Meaning
An imagined perfect society or place where everything is ideal.
Example
Many philosophers dreamed of creating a utopia for humanity.
多くの哲学者は人類のためにユートピアを作る夢を見ていました。
C1 adjective /ˈʌpərˌmoʊst/

uppermost

最上
Meaning
situated at the highest place or most important
Example
Her family's safety was uppermost in her mind during the crisis.
危機の間、彼女の心の中で最も重要なのは家族の安全でした。
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

認められない
Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
彼女のプロジェクトへの貢献は認められなかった。
B2 noun /ʌnəˈbɪləti/

unability

無能力
Meaning
the state of being unable to do something; incapacity
Example
His unability to solve the problem caused delays in the project.
彼の問題を解決する無能力はプロジェクトの遅延を引き起こした。
B2 adjective /ʌnˈbiːtən/

Unbeaten

負けなし; 敗北なし
Meaning
not defeated; having never lost; undefeated
Example
The team remains unbeaten this season.
そのチームは今シーズン無敗です。
C1 adjective /ʌnˈtaɪərɪŋ/

Untiring

不屈の; 絶え間ない; 疲れを知らない
Meaning
continuing without stopping; persistent; tireless
Example
Her untiring efforts finally led to success.
彼女の不屈の努力は最終的に成功に繋がった。
C1 noun /ˈʌp.ʃɒt/

Upshot

結果; 結論
Meaning
the final result or outcome of a series of events; conclusion
Example
The upshot of the meeting was a decision to postpone the project.
会議の結果はプロジェクトの延期を決定することでした。
B2 adjective /ʌnˈhɛlpfəl/

unhelpful

役に立たない
Meaning
not providing help or support; making a situation harder rather than easier
Example
His unhelpful attitude slowed down the entire project.
彼の役に立たない態度はプロジェクト全体を遅らせた。
C1 adjective /ʌnˈsteɪtɪd/

unstated

未表明
Meaning
not expressed directly in words; implied or left unsaid
Example
The contract included several unstated expectations.
契約にはいくつかの未表明の期待が含まれていました。
C1 noun ˈʌp.raɪ.zɪŋ

uprising

反乱
Meaning
An act of resistance or rebellion; a revolt against an authority or government.
Example
The uprising marked the beginning of the revolution.
反乱は革命の始まりを示しました。
C1 adjective /ʌnˈdɔːntɪd/

Undaunted

不屈の; 勇敢な; 断固たる;
Meaning
not intimidated or discouraged by difficulty, danger, or disappointment
Example
Despite the setbacks, she remained undaunted in pursuing her goals.
挫折にもかかわらず、彼女は目標を追い続ける中で不屈であり続けた。
B2 adverb /ʌnˈnesəserəli/

Unnecessarily

不必要に
Meaning
to a greater extent than is needed; without necessity
Example
Don't worry unnecessarily about the exam.
試験について不必要に心配しないでください。