beau
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C2 noun /boʊ/

beau

ボーイフレンド
Meaning
a male admirer or boyfriend; a fashionable young man
Example
She arrived at the party with her beau.
彼女は彼氏と一緒にパーティーに来ました。
C2 noun /bəˈfuːn/

buffoon

道化師
Meaning
A ridiculous but amusing person; a clown or jester.
Example
He acted like a buffoon at the party, making everyone laugh.
彼はパーティーで道化師のように振る舞い、みんなを笑わせた。
C2 verb /bɪˈmjuːz/

bemuse

困惑させる
Meaning
To confuse or puzzle someone.
Example
The complex instructions bemused the new employees.
複雑な指示が新しい従業員を困惑させました。
C2 noun ˈbaɪəʊˌsaɪd

biocide

バイオサイド
Meaning
A chemical substance or microorganism intended to destroy, deter, render harmless, or exert a controlling effect on any harmful organism.
Example
Biocides help control pests and reduce the spread of diseases.
バイオサイドは害虫をコントロールし、病気の拡散を減らすのに役立ちます。
C2 verb /bɪˈsmɪər/

besmear

汚す
Meaning
to smear or cover with a sticky or dirty substance; to soil
Example
His clothes were besmeared with mud.
彼の服は泥で汚れていた。
C2 noun /ˈbɑːr.kəˌroʊl/

barcarole

バルカロール
Meaning
a traditional Venetian boat song, often in 6/8 time
Example
The orchestra played a beautiful barcarole that reminded me of Venice.
オーケストラは美しいバルカロールを演奏し、私にヴェネツィアを思い出させました。
C2 noun /ˌbɒmbərˈdɪər/

bombardier

爆撃手
Meaning
a member of a bomber crew responsible for releasing bombs
Example
The bombardier released the bombs with precision.
爆撃手は正確に爆弾を投下した。
C2 adjective /ˈbɛərˌfeɪst/

barefaced

厚かましい
Meaning
shameless and undisguised; openly bold or unashamed
Example
He told a barefaced lie in front of everyone.
彼はみんなの前で厚かましい嘘をついた。
C2 noun /breɪ/

brae

斜面
Meaning
A hillside or slope, especially in Scotland.
Example
They climbed up the grassy brae to see the sunset.
彼らは草に覆われた斜面を登って夕日を見ました。
C2 verb /ˈbæstərdaɪz/

bastardize

歪める
Meaning
to corrupt or debase something by altering it from its original form; to change in a way that reduces quality or purity
Example
Critics argue that the remake bastardized the original novel.
批評家たちはそのリメイクが原作を歪めたと言っている。
C2 noun /ˈbɪɡ.ə.mi/

bigamy

重婚
Meaning
The act of marrying one person while still legally married to another.
Example
He was charged with bigamy after his second marriage was discovered.
彼は二度目の結婚が発覚した後、重婚で起訴されました。
C2 verb /breɪ/

bray

鳴き声
Meaning
To make a loud, harsh sound like a donkey.
Example
The donkey began to bray loudly in the field.
ロバは畑で大声で鳴き始めました。
C2 noun brəˈvɑː.dəʊ

bravado

実際ではない勇気や自信の誇示
Meaning
Show of courage or confidence that is not real.
Example
His bravado masked his nervousness before the performance.
彼のブラヴァードはパフォーマンス前の緊張を隠していた。
C2 adjective /bjuːˈkɒlɪk/

bucolic

田園
Meaning
Relating to the pleasant aspects of the countryside and country life.
Example
They enjoyed a bucolic picnic by the river.
彼らは川沿いで田園風のピクニックを楽しみました。
C2 noun /ˈbɛnɪfɪs/

benefice

教会職
Meaning
a permanent church appointment for which property and income are provided
Example
The bishop appointed him to a wealthy benefice.
司教は彼を裕福な教会職に任命しました。
C2 verb /bɪˈleɪ/

belay

ロープを固定する
Meaning
to secure a rope by winding it around an object; to stop or cancel an order (nautical/military use)
Example
The climber asked his partner to belay the rope tightly.
クライマーはパートナーにロープをしっかりと確保するように頼んだ。
C2 verb /bɪˈstraɪd/

bestride

支配する
Meaning
To sit or stand astride something; to dominate over.
Example
The statue bestrides the city square.
その像は都市広場を支配しています。
C2 verb /bɪˈdɔːb/

bedaub

塗る
Meaning
to smear or cover with a sticky or dirty substance
Example
The children bedaubed the wall with paint.
子供たちは壁にペンキを塗った。
C2 verb, noun /blæb/

blab

ぺらぺら話す；秘密を漏らす
Meaning
to talk too much or reveal secrets carelessly; excessive or foolish talk
Example
He accidentally blabbed the surprise to everyone.
彼はうっかりサプライズをみんなに話してしまった。
C2 noun /bel ˈæp.əl/

Bell apple

ベルリンゴ
Meaning
a tropical fruit with a crisp texture and sweet taste, scientifically known as Syzygium malaccense
Example
The bell apple tree produces beautiful red fruits that are popular in tropical regions.
ベルリンゴの木は美しい赤い果物を生産し、熱帯地域で人気があります
C2 noun /ˈbuːbi/

booby

ばか
Meaning
a foolish or gullible person; a silly individual
Example
He felt like a booby after making such a simple mistake.
そんな簡単な間違いをして、彼は自分をばかだと感じた。
C2 noun /ˈbɜːrsər/

bursar

会計係
Meaning
An official in a school or college responsible for financial affairs.
Example
The bursar approved the budget for the new library.
会計係は新しい図書館の予算を承認しました。
C2 verb /bɪˈhəʊv/

behove

適切である
Meaning
British spelling of 'behoove'; to be appropriate or necessary
Example
It would behove the company to listen to its customers.
会社は顧客の意見に耳を傾けるべきです。
C2 verb /bɪˈhuːv/

behoove

誰かが何かをすることが必要または適切である
Meaning
to be necessary, proper, or appropriate for someone to do
Example
It would behoove you to study before the exam.
試験の前に勉強することが必要です。
C2 noun /ˈbræɡərt/

braggart

自慢屋
Meaning
a person who boasts about achievements or possessions
Example
No one liked him because he was such a braggart.
誰も彼を好きではなかった、なぜなら彼は大きな自慢屋だったから。
C2 noun /ˈbriːtʃɪz/

Breeckes

膝丈パンツ
Meaning
knee-length trousers; short pants
Example
He wore riding breeches for the equestrian event.
彼は馬術イベントのために膝丈パンツを履いていました。
C2 adjective /bɪˈfɒɡd/

befogged

混乱した, ぼんやりした
Meaning
Confused or clouded in mind; made unclear like being surrounded by fog.
Example
His mind felt befogged after the long and exhausting meeting.
長く疲れる会議の後、彼の心は混乱しているように感じた。
C2 adjective /ˈbæti/

batty

変わり者
Meaning
crazy or eccentric in behavior
Example
The old man down the street is a bit batty but harmless.
通りの古い男は少し変わり者だが、無害だ。
C2 verb /beɪt/

bate

減らす、抑える
Meaning
to lessen or restrain; to diminish the force or intensity of something
Example
He spoke with bated breath as he waited for the result.
彼は結果を待ちながら息を呑んで話した。
C2 noun /ˈbuː.jɒ̃/

bouillon

ブイヨン
Meaning
A clear, seasoned broth made by simmering meat, fish, or vegetables in water.
Example
She added vegetables to the bouillon for extra flavor.
彼女は味を加えるためにブイヨンに野菜を加えました。
C2 verb /bɪˈstruː/

bestrew

撒く
Meaning
To scatter or cover something with objects or substances.
Example
The ground was bestrewn with autumn leaves.
地面は秋の葉で覆われていた。
C2 noun /ˈbɜːrɡər/

burgher

市民（裕福な中産階級）
Meaning
A citizen of a town, typically a member of the wealthy middle class.
Example
The burgher was respected as a prosperous merchant in the city.
その市民は、町で繁栄している商人として尊敬されていました。
C2 verb /bɪˈweɪl/

bewail

嘆き悲しむ
Meaning
to express deep sorrow or regret over something; to mourn openly
Example
She bewailed the loss of her childhood home.
彼女は子どもの頃の家を失ったことを嘆き悲しんだ。
C2 verb /ˈbækbaɪt/

backbite

陰口を言う
Meaning
to speak negatively about someone who is not present; to slander behind someone’s back
Example
It is wrong to backbite your colleagues behind their backs.
同僚の陰口を言うのはよくない。
C2 adverb /bɪˈtaɪmz/

betimes

早く
Meaning
early; in good time
Example
She rose betimes to finish her work.
彼女は仕事を終わらせるために早く起きました。
C2 noun /ˈbrɪtɪˌsɪzəm/

briticism

イギリス英語の単語または特徴
Meaning
a word, phrase, or characteristic feature of British English
Example
The word 'lorry' is a well-known Briticism.
'lorry' という言葉はよく知られているブリティシズムです。
C2 noun /bʊr/

Boor

野蛮人; 無礼な人
Meaning
a rough and bad-mannered person; someone who lacks refinement or culture
Example
The wealthy businessman was actually a boor who showed no respect for others.
その裕福なビジネスマンは実際には他の人々に対して敬意を示さなかった野蛮人でした。
C2 adjective /bɪˈfʌdld/

befuddled

困惑した
Meaning
confused, unable to think clearly
Example
He looked befuddled after hearing the complex instructions.
彼は複雑な指示を聞いた後、困惑したように見えました。
C2 noun /beɪz/

baize

粗いウールの布の一種
Meaning
A type of coarse woolen cloth, often green, used for covering tables such as billiard tables.
Example
The old card table was covered with worn baize.
古いカードテーブルは、擦り切れたベイズで覆われていました。
C2 adjective /ˌbiːəˈtɪfɪk/

beatific

至福の
Meaning
blissfully happy or showing great joy
Example
She had a beatific smile after hearing the good news.
彼女は良い知らせを聞いた後、至福の笑顔を浮かべていた。
C2 adjective /ˈbeɪlfəl/

baleful

威圧的な
Meaning
Threatening harm; menacing or expressing hatred.
Example
She gave him a baleful look after the insult.
侮辱の後、彼女は彼に威圧的な目を向けた。
C2 verb /bɪˈsiːtʃ/

beseech

懇願する
Meaning
To ask someone urgently and fervently to do something; to beg.
Example
He beseeched the judge for mercy.
彼は裁判官に慈悲を請いました。
C2 verb /ˈbɪloʊ/

billow

波のように膨らむ
Meaning
To swell or rise in large waves or surges; to flow outward in a rolling motion.
Example
Smoke billowed from the burning building.
煙は燃えている建物から波のように膨らんでいた。
C2 noun /ˈbɒnəmi/

bonhomie

友好
Meaning
Cheerful friendliness and geniality.
Example
The meeting was filled with laughter and bonhomie.
会議は笑いと友好で満ちていた。
C2 adjective /ˈbiːstiəl/

bestial

獣のような
Meaning
Relating to beasts; showing savagery, brutality, or lacking human sensibility.
Example
The prisoners were treated in a bestial manner.
囚人たちは獣のような扱いを受けた。
C2 adjective /ˈbrɪndl̩d/

brindled

ぶち模様
Meaning
Having a brownish or tawny color with streaks or spots of another color.
Example
The farmer owned a brindled cow with distinctive stripes.
農家は特徴的なストライプのあるぶち模様の牛を飼っていた。
C2 noun /bɪˈnɪɡnɪti/

Benignity

優しさ; 穏やかさ; 良いまたは親切な性質
Meaning
kindness; gentleness; the quality of being benign or gracious
Example
Her benignity towards all people made her beloved by everyone.
彼女の優しさは、彼女をすべての人々から愛される存在にしました。
C2 noun /blæk ˈkɑːr.də.məm/

Black Cardamom

黒カルダモン
Meaning
a large aromatic spice pod with a smoky flavor, commonly used in Indian and Middle Eastern cooking
Example
Add black cardamom to the curry for a rich, smoky flavor.
カレーに黒カルダモンを加えて、リッチでスモーキーな風味を楽しんでください。
C2 verb /ˈblækˌbɔːl/

blackball

排除する
Meaning
to exclude someone socially or vote against their membership in a group or club
Example
He was blackballed from the club after the controversy.
彼は論争の後、クラブから排除された。
C2 adjective /bɪˈwɪtʃɪŋ/

bewitching

魅惑的
Meaning
charming, enchanting, or captivating in a magical or irresistible way
Example
She wore a bewitching smile that captivated everyone in the room.
彼女は魅惑的な笑顔を見せ、部屋の中の全員を魅了しました。
C2 noun /ˈbʌt.ə.flaɪ piː/

Butterfly Pea

蝶豆
Meaning
a blue flowering plant with butterfly-shaped flowers, used to make herbal tea
Example
Butterfly pea flowers turn tea into a beautiful blue color.
蝶豆の花はお茶を美しい青色に変えます。
C2 verb /bɪˈlaɪ/

belie

偽る
Meaning
To give a false impression of something; to contradict.
Example
His calm face belied his inner anxiety.
彼の落ち着いた顔は彼の内なる不安を偽っていた。
C2 noun /bəˈθɪm.ə.tri/

bathymetry

水深測定学
Meaning
The measurement of depth of water in oceans, seas, or lakes.
Example
Bathymetry is essential for understanding oceanic topography.
バチメトリーは海洋の地形を理解するために不可欠です。
C2 noun /bɑːrd/

bard

詩人
Meaning
a poet, traditionally one reciting epics and associated with oral traditions
Example
Shakespeare is often called the Bard of Avon.
シェイクスピアはしばしばアヴォンの詩人と呼ばれます。
C2 noun /ˌbenɪˈdɪkʃən/

Benediction

祝福
Meaning
a blessing, especially a ceremonial one; an expression of good wishes
Example
The priest gave his benediction to the newlyweds.
神父は新婚夫婦に祝福を与えました。
C2 noun /ˈbʊlrʌʃ/

bulrush

ヨシ
Meaning
A tall plant with long leaves that grows in or near water, also known as a cattail.
Example
The pond was surrounded by tall bulrushes swaying in the wind.
池は風に揺れる高いヨシで囲まれていました。
C2 noun /biˈætɪtjuːd/

beatitude

至高の幸福または祝福、しばしば山上の説教でのイエスの言葉に関連して使用される
Meaning
supreme blessedness or happiness, often used in reference to the sayings of Jesus in the Sermon on the Mount
Example
She felt a state of beatitude after receiving the good news.
良い知らせを受け取った後、彼女は幸福の状態を感じていた。
C2 noun /ˈbɛnɪsən/

benison

祝福
Meaning
A blessing or benefit.
Example
The rain was a benison for the drought-stricken farmers.
その雨は干ばつに苦しむ農民たちにとって祝福でした。
C2 adjective /bɪˈsɒtɪd/

besotted

夢中な、恋に狂った
Meaning
strongly infatuated or obsessed with someone or something
Example
He was completely besotted with her charm.
彼は彼女の魅力に完全に夢中だった。
C2 adjective /ˈbrætɪʃ/

brattish

わがまま
Meaning
acting like a spoiled child; behaving in an annoying, self-centered way
Example
The brattish boy threw a tantrum when he didn’t get his toy.
わがままな男の子は、おもちゃがもらえなかったときに駄々をこねました。
C2 verb /bɪˈtroʊð/

betroth

婚約する
Meaning
To formally promise to marry someone; to engage.
Example
He was betrothed to the princess at a young age.
彼は若い頃、王女と婚約していた。
C2 noun /bəˈlɛəroʊ/

bolero

ボレロ（スペインのダンスまたは前が開いた短いジャケット）
Meaning
A Spanish dance in slow triple time, or a short jacket open at the front.
Example
The dancers performed a passionate bolero at the festival.
ダンサーたちはフェスティバルで情熱的なボレロを演奏しました。
C2 noun /ˌbræɡəˈdoʊʃioʊ/

braggadocio

自慢話
Meaning
boastful or arrogant behavior; empty boasting
Example
His endless braggadocio annoyed everyone at the party.
彼の終わりのない自慢話はパーティーの皆をイライラさせた。
C2 noun /ˈbrɛviˌɛri/

breviary

祈祷書
Meaning
A book containing the service for each day, used in Christian liturgy.
Example
The monk read from the breviary during morning prayers.
修道士は朝の祈りの間に祈祷書から読んでいました。
C2 noun /ˈbʌt.ər fɪʃ/

Butter-fish

バターフィッシュ
Meaning
a small, smooth-skinned marine fish
Example
The butter-fish is popular in Bengali cuisine.
バターフィッシュはベンガル料理で人気があります。
C2 noun /ˈblʌfər/

bluffer

はったり屋
Meaning
a person who pretends to be more confident, skilled, or knowledgeable than they really are; someone who deceives others by bluffing
Example
Everyone eventually realized that he was just a bluffer with no real experience.
彼がただのはったり屋だと皆が気づいた。
C2 verb /beɪst/

baste

調理中に肉に溶かした脂肪、ジュース、または液体をかけて、ジューシーさを保つ
Meaning
to pour or brush melted fat, juices, or liquid over meat during cooking to keep it moist
Example
She basted the turkey every 30 minutes to keep it juicy.
彼女は30分ごとに七面鳥をベイステッドしてジューシーに保ちました。
C2 noun /ˌbɪbliəʊˈmeɪniə/

bibliomania

ビブリオマニア
Meaning
An extreme obsession with collecting or possessing books.
Example
His bibliomania led him to fill every room with books.
彼のビブリオマニアは、彼を本で部屋をいっぱいにさせた。
C2 noun /ˈbærəˌɡræf/

barograph

大気圧の変化を記録する機器
Meaning
an instrument that records changes in atmospheric pressure
Example
The scientist checked the barograph for pressure variations.
科学者は圧力の変動を調べるためにバログラフを確認した。
C2 noun /ˈbiːlaɪn/

beeline

一直線
Meaning
a straight, direct route to a destination
Example
He made a beeline for the food table as soon as he entered the party.
彼はパーティーに入ったとたん、食べ物のテーブルに直行しました。
C2 noun /bɪsk/

bisque

シーフードスープ
Meaning
A rich, creamy soup made from shellfish.
Example
We ordered lobster bisque at the restaurant.
レストランでロブスタービスクを注文しました。
C2 adjective /boʊˈhiːmiən/

bohemian

ボヘミアン
Meaning
unconventional, artistic, and free-spirited in lifestyle or appearance
Example
She decorated her apartment in a bohemian style with colorful fabrics.
彼女はカラフルな布でボヘミアンスタイルでアパートを飾りました。
C2 noun /ˈbɒmbæst/

bombast

大げさな言葉
Meaning
speech or writing that is overly pompous and inflated
Example
His campaign speech was full of bombast but lacked real substance.
彼の選挙演説はボンバストに満ちていたが、実際の実質は欠けていた。
C2 adjective /blɑːˈzeɪ/

blase

無関心, 無感動
Meaning
unimpressed or indifferent to something because it has been experienced so often before
Example
After years of luxury travel, she felt blase about another trip to Paris.
何年もの贅沢な旅行の後、彼女はパリへの別の旅行に対して無関心を感じた。
C2 verb /ˈbændi/

bandy

Meaning
To pass (words, ideas, or gossip) back and forth in a casual or argumentative way.
Example
They bandied jokes across the table.
C2 adjective /bɒmˈbæstɪk/

bombastic

派手な
Meaning
using pompous or inflated language with little meaning
Example
The professor’s bombastic lecture impressed no one.
教授の派手な講義は誰にも印象を与えませんでした。
C2 adjective /ˈbʌksəm/

buxom

豊満で魅力的な女性
Meaning
Plump, with a full figure and often large-breasted, especially used to describe women.
Example
The actress was described as a cheerful and buxom woman.
女優は明るくて豊満な女性として描かれました。
C2 noun /bænˈdænə/

bandanna

大きなカラフルなバンダナ
Meaning
A large, often brightly colored handkerchief, typically worn on the head or around the neck.
Example
He tied a red bandanna around his neck.
彼は首に赤いバンダナを結んだ。
C2 noun /ˈbrɪk ə ˌbræk/

bric-a-brac

小さな装飾品
Meaning
Small decorative objects or ornaments, often of little value.
Example
The shelves were filled with old bric-a-brac from her travels.
棚は彼女の旅行から持ち帰った古い小さな装飾品でいっぱいだった。
C2 noun /ˌbluː ˈblʌd/

Blue-blood

ブルーブラッド
Meaning
a person of noble birth; aristocrat
Example
She came from a family of blue-bloods with centuries of royal heritage.
彼女は数世代にわたる王室の遺産を持つブルーブラッドの家族から来ました。
C2 adjective /ˈblaɪðsəm/

blithesome

陽気
Meaning
cheerful, carefree, and full of joy
Example
She entered the room with a blithesome smile that lifted everyone's spirits.
彼女は陽気な笑顔で部屋に入り、皆の気分を盛り上げました。
C2 adjective /ˈbɑː.bər.əs/

Barbarous

野蛮な; 残忍な; 未開の
Meaning
extremely cruel; uncivilized; savage
Example
The barbarous treatment of prisoners was condemned by human rights organizations.
囚人に対する野蛮な扱いは人権団体によって非難された。
C2 noun /ˈbaɪəˌɡræf/

biograph

伝記
Meaning
A written account of a person's life; an early motion-picture projector (historical use).
Example
The library holds an old biograph of the poet.
図書館には詩人の古い伝記があります。
C2 noun /ˈbriːzˌweɪ/

breezeway

屋根付き通路
Meaning
A roofed outdoor passage, often connecting two buildings.
Example
The breezeway connected the house to the garage.
その通路は家とガレージを繋げていた。
C2 adjective /baɪˈkæmərəl/

bicameral

二院制
Meaning
Having two branches or chambers, especially in a legislature.
Example
The United States has a bicameral legislature consisting of the Senate and the House of Representatives.
アメリカ合衆国には上院と下院から成る二院制の立法機関があります。
C2 noun /ˈbʌɡəˌbuː/

bugaboo

恐怖 / 不安
Meaning
An object of fear or worry; an imagined cause of anxiety.
Example
The threat of inflation became a political bugaboo.
インフレーションの脅威は政治的な恐怖に変わった。
C2 adjective /bɪˈhoʊldən/

beholden

恩義を感じている、または借りがある
Meaning
indebted or obliged to someone for a service or help
Example
He felt beholden to his mentor for all the guidance.
彼はすべての指導に対してメンターに恩義を感じていました。
C2 noun /ˈbɛlfri/

belfry

鐘楼
Meaning
A bell tower, especially one attached to a church or building.
Example
The church belfry housed a large bronze bell.
教会の鐘楼には大きな銅の鐘がありました。
C2 adjective, noun /bɪˈtroʊðd/

betrothed

婚約者
Meaning
Engaged to be married; a person who is engaged.
Example
She introduced him as her betrothed.
彼女は彼を婚約者として紹介しました。
C2 noun /ˈbaɪpɛd/

biped

二足歩行動物
Meaning
An animal that walks on two feet.
Example
Humans are examples of biped creatures.
人間は二足歩行動物の例です。
C2 adjective /blaɪð/

blithe

無頓着
Meaning
Showing a casual and cheerful indifference considered improper or carefree happiness.
Example
She had a blithe disregard for the rules.
彼女はルールを無頓着に無視した。
C2 noun /ˈbeɪleɪ/

Bele

ベレ魚
Meaning
a type of freshwater fish found in South Asian rivers, known for its distinctive appearance
Example
The bele fish is commonly caught in the rivers of Bangladesh.
ベレ魚はバングラデシュの川でよく捕まえられる。
C2 verb /ˈblʌstər/

bluster

大声で自慢する
Meaning
to speak loudly in an aggressive or threatening way, often without real power
Example
The manager blustered about firing people but did nothing.
マネージャーは人を解雇すると大声で言ったが、何もしなかった。
C2 noun /bjuːt/

butte

ビュート
Meaning
an isolated hill with steep sides and a flat top, common in arid regions
Example
The travelers could see a tall butte rising in the desert.
旅行者たちは砂漠の中に高いビュートが立ち上るのを見ることができました。
C2 verb /ˈbɜːrnɪʃ/

burnish

Meaning
To polish something by rubbing; to enhance or improve.
Example
He burnished the old table until it shone.
C2 noun /ˈbʌskɪn/

buskin

厚底ブーツ
Meaning
A type of thick-soled boot that reaches halfway to the knee; also associated with tragic drama in ancient times.
Example
The actor wore a buskin as part of his classical costume.
俳優は彼のクラシックな衣装の一部としてバスキンを履いていました。
C2 noun /ˈbækənæl/

bacchanal

狂乱のパーティ
Meaning
A noisy party involving drinking and revelry.
Example
The festival turned into a wild bacchanal by midnight.
祭りは真夜中に狂乱のパーティに変わった。
C2 adjective /ˈbɛlɪˌkoʊs/

bellicose

戦闘的
Meaning
Showing a tendency to argue or fight; aggressive.
Example
His bellicose attitude often got him into unnecessary conflicts.
彼の戦闘的な態度はしばしば不必要な対立を引き起こした。
C2 noun /ˈbrɔːdˌsaɪd/

broadside

激しい攻撃
Meaning
a strong verbal attack or a sheet of paper printed on one side
Example
The politician launched a broadside against his opponent.
政治家は相手に対して激しい攻撃を仕掛けました。
C2 verb /bɪˈtaɪd/

betide

起こる
Meaning
to happen or occur, usually of something that befalls someone
Example
Woe betide anyone who breaks the rules.
ルールを破る者は災難を被るだろう。
C2 noun /briːtʃ/

breech

Meaning
The back part of a gun barrel; a position of a baby in the womb where the buttocks or feet come out first at birth.
Example
The rifle was loaded through the breech.
C2 noun /ˈbɑːr.bər/

Barbar

理髪師
Meaning
a person whose job is to cut men's hair and shave or trim beards
Example
The barber gave him a perfect haircut for his wedding.
理髪師は彼の結婚式のために完璧なヘアカットをしました。
C2 noun /ˈbiː.təl nʌt/

Betel-nut

ベテルナッツ
Meaning
seed of the areca palm tree, often chewed as a stimulant
Example
Betel-nut is commonly chewed in many South Asian countries.
ベテルナッツは南アジアの多くの国で一般的に噛まれています。
C2 noun /ˈbɪvuˌæk/

bivouac

仮設キャンプ
Meaning
a temporary camp without tents or cover, usually used by soldiers or mountaineers
Example
The climbers set up a bivouac on the mountainside.
登山者たちは山の斜面に仮設キャンプを設置した。
C2 noun /ˈbælæst/

ballast

バラスト
Meaning
heavy material used to stabilize a ship or vehicle
Example
The ship was loaded with ballast to remain steady in the storm.
嵐の中で船が安定を保つためにバラストが積まれていました。
C2 verb /bɪˈɡaɪl/

beguile

魅了する / 欺いて引きつける
Meaning
to charm or enchant someone, often in a deceptive way
Example
She beguiled the audience with her storytelling.
彼女はストーリーテリングで観客を魅了した。
C2 noun /ˈbiːtənd raɪs/

Beatened rice

ビート米
Meaning
flattened rice; rice that has been parboiled, dried, and beaten into flat flakes
Example
Beaten rice is commonly eaten with milk and sugar for breakfast.
ビート米は通常、朝食で牛乳と砂糖と一緒に食べられます。
C2 noun /bəˈnæləti/

banality

陳腐
Meaning
The condition of being unoriginal, boring, or obvious; trite remark or quality.
Example
The speech was criticized for its banality and lack of originality.
そのスピーチは陳腐と独創性の欠如で批判されました。
C2 adjective /ˈbreɪsɪŋ/

bracing

爽快な
Meaning
Invigorating, refreshing, or providing strength and energy.
Example
The hikers enjoyed the bracing mountain air.
登山者たちは爽快な山の空気を楽しんだ。
C2 noun /buːb/

boob

ばか者；胸（俗語）
Meaning
a foolish or clumsy person; an informal and sometimes rude term for a woman's breast
Example
He felt like a complete boob after forgetting the meeting.
会議を忘れて、彼は完全なばか者だと感じた。
C2 verb /ˈblʌdʒən/

bludgeon

鈍器で殴る
Meaning
to hit someone with a heavy object; to force someone into doing something
Example
The guard was bludgeoned by the attacker in the alley.
ガードは小道で攻撃者に鈍器で殴られた。
C2 noun /brəˈkeɪd/

brocade

刺繍布
Meaning
a rich fabric woven with a raised pattern, often in gold or silver thread
Example
She wore a beautiful brocade dress to the wedding.
彼女は結婚式で美しいブロケイドのドレスを着ていました。
C2 noun /boʊl/

bole

木の幹
Meaning
the trunk of a tree
Example
The bole of the tree was thick and strong.
木の幹は太くて強かった。
C2 verb /breɪz/

braze

ブレイズ
Meaning
To join two pieces of metal by heating and melting a filler metal into the joint.
Example
The mechanic brazed the broken pipe to fix the leak.
メカニックは壊れたパイプを溶接して漏れを修理しました。
C2 noun /ˌbʌkəˈnɪər/

buccaneer

海賊
Meaning
a pirate, especially one active in the Caribbean during the 17th and 18th centuries
Example
The buccaneer sailed across the Caribbean in search of treasure.
その海賊はカリブ海を航海し、宝物を探していた。
C2 noun /brɪˈtæniə/

britannia

ブリタニア
Meaning
the personification of Britain, often shown as a woman with a helmet and shield
Example
Britannia has been a symbol of Britain since Roman times.
ブリタニアはローマ時代からイギリスの象徴です。
C2 verb /bɪˈfʌdəl/

befuddle

混乱させる
Meaning
to confuse someone completely; to make someone unable to think clearly
Example
The complex instructions befuddled the students.
複雑な指示が学生たちを混乱させました。
C2 noun /ˈbɪlɪŋzˌɡeɪt/

billingsgate

粗野または侮辱的な言葉
Meaning
Coarse or abusive language; vulgar or offensive speech.
Example
The heated argument quickly descended into billingsgate.
激しい議論はすぐに粗野な言葉に変わった。
C2 adjective /ˈbʊərɪʃ/

boorish

粗野
Meaning
Rude, insensitive, and lacking manners or refinement.
Example
His boorish behavior ruined the dinner party.
彼の粗野な行動はディナーパーティーを台無しにした。
C2 noun /ˌbaɪ.oʊ.rɪˌmiː.diˈeɪ.ʃən/

bioremediation

バイオレメディエーション
Meaning
The use of living organisms to neutralize or remove environmental contaminants.
Example
Bioremediation helps remove toxins from polluted soil.
バイオレメディエーションは汚染された土壌から毒素を取り除くのに役立ちます。
C2 verb /bɪˈliːɡər/

beleaguer

包囲する, 困らせる
Meaning
to cause difficulties, troubles, or harassment; to surround with military forces
Example
The company was beleaguered by constant complaints from its customers.
その会社は顧客からの絶え間ない苦情で包囲されていた。