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C2 adjective /ˈbuːtləs/

bootless

無駄な
Meaning
Useless or futile; of no benefit.
Example
His bootless attempt to fix the machine only wasted time.
機械を修理する彼の無駄な試みは時間を無駄にしただけだった。
C1 verb /ˈbʌŋɡəl/

bungle

台無しにする
Meaning
To carry out a task clumsily or incompetently.
Example
He bungled the presentation and confused the audience.
彼はプレゼンテーションを台無しにし、聴衆を混乱させました。
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 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。
C1 noun /bruːˈtæləti/

brutality

残虐さ
Meaning
extreme cruelty or violence; savage or inhumane treatment
Example
The brutality of the attack shocked the entire community.
その攻撃の残虐さは地域全体を震撼させた。
C2 adverb /ˈbruːskli/ or /ˈbrʌskli/

brusquely

無愛想に
Meaning
in a blunt, abrupt, or rude manner
Example
She brusquely dismissed the suggestion.
彼女は無愛想に提案を拒否しました。
C1 verb /bɪˈhoʊld/

behold

見る；目にする
Meaning
to see or observe something, especially something remarkable or impressive
Example
She stood quietly to behold the sunrise over the hills.
彼女は丘の上の日の出を見るために静かに立っていた。
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。
C1 noun /ˌbaɪˈlæt.ər.əl nɪˌɡəʊ.ʃiˈeɪ.ʃənz/

bilateral negotiations

二国間交渉
Meaning
Negotiations or discussions between two parties, typically countries or organizations.
Example
Bilateral negotiations resolve disputes.
二国間交渉は紛争を解決する。
A2 noun, verb /bræntʃ/

branch

支店
Meaning
A part of a tree that grows out from the trunk; a division of an organization or subject.
Example
The company opened a new branch in Dhaka.
会社はダッカに新しい支店を開設しました。
B2 noun ˈbaɪ.əs

bias

偏見, バイアス
Meaning
Prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.
Example
The judge must remain free from bias.
裁判官はバイアスなしでいなければならない。
C2 verb /bɪˈnʌm/

benumb

麻痺させる
Meaning
to make physically numb or without sensation; to make mentally dull or insensitive
Example
The freezing wind seemed to benumb his fingers within minutes.
凍える風が数分で彼の指を麻痺させた。
C2 noun /ˈbrɪk.bæt/

Brickbat

レンガの破片; 厳しい批判または非難
Meaning
a piece of brick, especially one used as a missile; harsh criticism or censure
Example
The angry protesters threw brickbats at the building windows.
怒った抗議者たちは建物の窓にレンガの破片を投げた。
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。
B1 noun /ˈbɒksər/

boxer

ボクサー; ボクサーパンツ; ボクサー犬
Meaning
a person who fights in the sport of boxing; a type of short loose-fitting underwear; a breed of medium-to-large dog
Example
The boxer trained hard every morning before the championship match.
そのボクサーはチャンピオンシップの前に毎朝厳しく練習した。
A2 noun /ˈbæskɪtbɔːl/

basketball

Meaning
a game played by two teams who try to score points by throwing a ball through a hoop
Example
He loves playing basketball with his friends.
C2 noun /brəˈvjʊrə/

bravura

Meaning
a display of great skill and brilliance, especially in music or performance
Example
The pianist delivered a bravura performance that left the audience spellbound.
A1 verb /bɪˈliːv/

believe

信じる
Meaning
to think that something is true; to have faith in
Example
I believe in hard work and dedication.
私は努力と献身を信じます。
C2 noun /ˌbædɪˈnɑːʒ/

badinage

冗談、遊び心のある会話
Meaning
Playful and humorous conversation; banter.
Example
The friends enjoyed a light badinage over coffee.
友達はコーヒーを飲みながら軽い冗談を楽しみました。
B1 noun /brif/

Brief

簡潔な; 短い
Meaning
a concise statement of the facts; a set of instructions given to a person about a job or task
Example
The lawyer received a detailed brief about the upcoming court case.
弁護士は次の裁判についての詳細なブリーフを受け取った。
C2 adjective /ˈbaɪ.fərˌkeɪ.tɪd/

bifurcated

二つに分かれた
Meaning
Divided into two branches or parts.
Example
The river became bifurcated as it flowed around the island.
川は島の周りを流れる際に二つに分かれました。
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。
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。
A2 verb /bɪˈlɒŋ/

belong

所属する
Meaning
to be in the right place or to be a member of a group
Example
She felt she truly belonged to the team.
彼女はチームに本当に所属していると感じていました。
B2 adverb /ˈbruːtəli/

brutally

残酷に
Meaning
in a cruel, violent, or harsh manner; in a very direct and blunt way
Example
The prisoners were treated brutally by the guards.
囚人たちは看守に残酷に扱われた。
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。
B2 noun /buːˈtiːk/

boutique

ブティックショップ
Meaning
a small shop that sells fashionable clothes or accessories
Example
She bought a beautiful dress from a boutique downtown.
彼女はダウンタウンのブティックショップで美しいドレスを買いました。
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。
A2 noun /ˈbraʊzər/

browser

ブラウザー
Meaning
a software application for accessing information on the World Wide Web.
Example
I use a web browser to search for information online.
私はオンラインで情報を検索するためにウェブブラウザーを使用します。
C1 verb /ˈbæfəl/

baffle

困惑させる
Meaning
to confuse; to be too difficult to understand
Example
The math problem baffles me completely.
数学の問題は私を完全に困惑させます。
B1 adjective /blæŋk/

blank

空白
Meaning
showing no expression or containing nothing written, printed, or recorded.
Example
Her face went blank when she heard the bad news.
悪いニュースを聞いたとき、彼女の顔は空白になった。
C1 verb /bɪˈreɪt/

berate

叱る
Meaning
to scold or criticize angrily
Example
The teacher berated the student for being late.
先生は遅刻した生徒を叱った。
C1 noun /ˈbaɪ.lɔː/

by-law

地方条例
Meaning
A rule made by a company, organization, or local authority to control the actions of its members.
Example
The city council passed a new by-law regulating street vendors.
市議会は、街頭の販売業者を規制する新しい条例を可決しました。
C1 noun /ˈbed sted/

Bed stead

ベッドフレーム
Meaning
the framework of a bed; a bed frame without bedding
Example
The wooden bed stead was very sturdy.
木製のベッドフレームは非常に丈夫でした。
C1 adjective /ˈbær.ən/

Barren

不毛の; 荒涼とした; 生産性がない; 不生産的
Meaning
sterile; unable to produce; desolate; unproductive
Example
The barren desert stretched for miles without any vegetation.
荒れ果てた砂漠は何マイルも広がり、植物は一切なかった。
B1 noun /ˈbæŋkɪŋ/

banking

銀行業務または銀行サービス
Meaning
the business or services provided by a bank
Example
Online banking has made financial transactions easier.
オンラインバンキングは金融取引を簡単にしました。
B1 noun /bʊk ˈsel.ər/

Book seller

本屋
Meaning
a person who sells books, especially as a business
Example
The book seller recommended a great novel for my summer reading.
本屋は私の夏の読書のために素晴らしい小説を勧めました。
C1 noun /brəˈzɪər/

Brassiere

ブラジャー
Meaning
a woman's undergarment designed to support the breasts
Example
She bought a comfortable brassiere for daily wear.
彼女は日常的に着るために快適なブラジャーを買いました。
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。
B2 noun/verb /ˈbʌfər/

buffer

バッファ / 衝撃吸収
Meaning
Something that lessens or absorbs the impact of a shock; to act as a protective barrier.
Example
The organization acts as a buffer between workers and management.
その組織は労働者と経営陣の間のバッファとして機能します。
C1 verb /bɔːl/

bawl

大声で泣く
Meaning
to shout or cry loudly
Example
The baby bawled all night, keeping everyone awake.
赤ちゃんは一晩中泣き続け、みんなを起こしてしまった。
A2 noun /ˈbeɪsˌbɔːl/

baseball

ベースボール
Meaning
a sport in which two teams try to score runs by hitting a ball and running around bases
Example
He loves watching baseball games on TV.
彼はテレビで野球の試合を見るのが好きです。
B2 adverb /bɪˈfɔːr.hænd/

Beforehand

前もって; 事前に; あらかじめ
Meaning
in advance; ahead of time; earlier
Example
We prepared everything beforehand.
私たちは前もってすべて準備しました。
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。
C1 noun /ˈblɒk.ɪdʒ/

Blockage

詰まり
Meaning
an obstruction that makes movement or flow difficult or impossible
Example
The drain blockage caused water to overflow in the kitchen.
排水の詰まりがキッチンで水があふれた原因となりました。
A2 adjective /breɪv/

brave

勇敢な
Meaning
showing courage in the face of danger or difficulty
Example
The brave firefighter rushed into the burning building.
勇敢な消防士が燃える建物に飛び込んだ。
B2 noun, verb /bɒb/

bob

上下に揺れる
Meaning
a short sudden movement up and down; to move quickly up and down
Example
The small boat began to bob on the waves.
小さなボートは波の上で上下に揺れ始めた。
B2 noun /ˈbækˌsaɪd/

backside

背中
Meaning
the rear part or surface of something; informal term for the buttocks
Example
The kids slid down the hill on their backside.
子供たちは丘を背中で滑り降りました。
C1 noun /bɑːm/

balm

軟膏
Meaning
A soothing ointment or something that provides comfort or relief.
Example
The balm helped relieve the pain from her sunburn.
そのバームは日焼けの痛みを和らげるのに役立ちました。
C2 verb /baɪd/

bide

待つ
Meaning
to wait patiently for the right time or opportunity
Example
He decided to bide his time before making a move.
彼は動きを起こす前に時間を待つことに決めました。
A1 adjective /blæk/

Black

黒
Meaning
having the darkest color; the opposite of white
Example
She wore a beautiful black dress to the party.
彼女はパーティーに美しい黒いドレスを着て行った。
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。
A2 verb /bɛɡ/

beg

お願いする
Meaning
to ask for something earnestly; to request humbly
Example
The child begged for a new toy.
その子供は新しいおもちゃをお願いしました。
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。
B1 noun /ˈbeɪsɪs/

basis

基礎
Meaning
the underlying support or foundation for an idea, argument, or process
Example
Trust is the basis of any strong relationship.
信頼は強い関係の基礎です。
B1 noun /ˈbæɹɪəz/

barriers

障壁
Meaning
Something that prevents progress or access; obstacles or hindrances.
Example
Language barriers can make communication difficult.
言語の壁がコミュニケーションを困難にすることがあります。
A2 noun /bɪər/

beer

ビール
Meaning
An alcoholic drink made from yeast-fermented malt flavored with hops.
Example
He ordered a glass of cold beer at the bar.
彼はバーで冷たいビールを注文した。
B1 noun /beɪkt miːt/

Baked meat

焼き肉
Meaning
meat that has been cooked in an oven using dry heat
Example
The baked meat was tender and flavorful.
焼き肉は柔らかくて美味しい。
C2 noun /ˈbɜːrdʒɪs/

burgess

市民
Meaning
A citizen of a town or borough with full rights of citizenship.
Example
In medieval times, a burgess had the right to vote and hold property.
中世では、市民は投票権と財産を所有する権利を持っていました。
A2 noun /ˈbenɪfɪt/

Benefit

利益; 便益; 利点
Meaning
an advantage or profit gained from something; a helpful or good effect
Example
Exercise has many health benefits for your body.
運動は体に多くの健康的な利益をもたらします。
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 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。
B2 noun /ˈbʊlɪt/

Bullet

弾丸
Meaning
a metal projectile fired from a gun
Example
The bullet missed its target and hit the wall.
その弾丸は標的を外し、壁に当たった。
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。
B2 adjective /ˈbɪtər/

Bitter

苦い; 強い味; 怒りや失望を表す
Meaning
having a sharp, pungent taste; feeling or showing anger and disappointment
Example
The medicine had a bitter taste.
薬は苦い味がしました。
B2 adjective /ˌbaɪəʊdɪˈɡreɪdəbl/

biodegradable

生分解性の
Meaning
Capable of being decomposed by natural biological processes, typically by bacteria or other living organisms, without causing harm to the environment.
Example
Biodegradable materials break down naturally without harming the environment.
生分解性の素材は自然に分解され、環境に害を与えることはありません。
B1 noun /blæk ˈber.i/

Black berry

ブラックベリー
Meaning
a small dark purple or black fruit that grows on bushes
Example
We picked fresh blackberries from the garden for our pie.
私たちは庭から新鮮なブラックベリーを摘んでパイを作りました。
B1 verb /ˈbrɔːdˌkæst/

broadcast

放送する
Meaning
to transmit a program or information by radio, television, or online media
Example
The match was broadcast live on television.
試合はテレビで生放送されました。
B2 adjective /ˌben.ɪˈfɪʃ.əl/

beneficial

有益な
Meaning
Resulting in good; favorable or advantageous.
Example
Eye rubbing can be beneficial in moderation.
目をこすることは適度であれば有益です。
C1 verb /ˈbɛkən/

beckon

手招きする
Meaning
to signal or call someone to come closer, often with a gesture; to attract or invite
Example
She beckoned him to come closer with a wave of her hand.
彼女は手を振って彼に近くへ来るよう合図した。
C2 verb /bɪˈdræɡəl/

bedraggle

泥や水を引きずって物を濡らし、汚し、乱れさせる
Meaning
to make something wet, dirty, and untidy by dragging it through mud or water
Example
The children came home bedraggled after playing in the rain.
子供たちは雨の中で遊んだ後、濡れて泥だらけで家に帰った。
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 /ˌbækəˈneɪliə/

bacchanalia

酒と楽しみの祭り
Meaning
A Roman festival of Bacchus celebrated with dancing, drinking, and revelry; any occasion of wild and drunken revelry.
Example
The novel describes the party as a bacchanalia of excess and joy.
小説はそのパーティーを過剰と喜びのバッカナリアとして描いています。
A2 noun /bænd/

band

バンド
Meaning
a group of musicians who play music together
Example
The band performed live at the concert.
バンドはコンサートでライブパフォーマンスをしました。
C2 adjective /ˈbʌmblɪŋ/

bumbling

不器用
Meaning
Acting in a clumsy, awkward, or confused way.
Example
The bumbling waiter spilled the drinks on the table.
その不器用なウェイターはテーブルに飲み物をこぼした。
C1 noun /ˈbenɪˌfæktər/

Benefactor

恩人; 支援者; 寄付者
Meaning
a person who gives money or other help to support a person or cause; a patron
Example
The anonymous benefactor donated millions to the hospital.
匿名の寄付者は病院に何百万も寄付しました。
A2 noun /ˈbɪz.nəs/

Business

ビジネス; 事業; 商業
Meaning
work relating to the production, buying, and selling of goods or services
Example
He started his own business after graduating from university.
彼は大学を卒業後、自分のビジネスを始めました。
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。
C1 noun /ˈbɜːrθraɪt/

birthright

生まれつきの権利
Meaning
A privilege or possession that a person has from birth.
Example
Freedom is considered a birthright of every individual.
自由はすべての個人の生まれつきの権利と見なされます。
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。
B1 noun, verb /ˈbʊli/

bully

いじめっ子 / 加害者
Meaning
A person who habitually seeks to harm or intimidate those weaker; to intimidate or mistreat someone weaker.
Example
The teacher stopped the older boy from trying to bully his classmates.
先生は年上の男の子がクラスメートをいじめるのを止めました。
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。
C1 noun /ˈblɛm.ɪʃ/

blemish

欠点
Meaning
A small mark or flaw that spoils the appearance of something.
Example
The mirror had a small blemish on the surface.
鏡には表面に小さな欠点があった。
C1 verb /bɪˈhɛd/

behead

斬首する
Meaning
to cut off a person's or animal's head; to remove the leader or most important part
Example
The historical account describes how the traitor was beheaded as punishment.
歴史的記録は、罰として裏切り者が斬首された様子を描写している。
C2 noun /ˈbɔːl.səm ˈæp.əl/

Balsam apple

苦瓜
Meaning
a bitter gourd vegetable with a bumpy green skin, also known as bitter melon
Example
Balsam apple is cooked with spices to reduce its bitter taste.
苦瓜はその苦味を減らすために香辛料と一緒に調理されます。
C1 adjective /ˈbaʊn.tɪ.fəl/

bountiful

豊富な / 寛大な
Meaning
Large in quantity; abundant; generous in giving.
Example
The farmer was grateful for the bountiful harvest.
農家は豊富な収穫に感謝していた。
C1 verb /ˈbæbəl/

babble

おしゃべりする
Meaning
to talk rapidly and continuously in a foolish way
Example
The baby babbles all day long.
赤ちゃんは一日中おしゃべりしています。
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 /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。
B2 noun /bɑnd/

Bond

絆; 債券
Meaning
a close connection joining two or more people; a certificate of debt issued by a government or corporation
Example
The strong bond between the mother and child was evident.
母親と子供の間の強い絆は明らかでした。
C1 noun /brɪˈɡeɪd/

brigade

消防隊
Meaning
A large group of people organized for a specific purpose, especially a military unit.
Example
The fire brigade arrived quickly to put out the flames.
消防隊は火を消すために迅速に到着しました。
A1 noun, verb /baɪk/

bike

自転車
Meaning
a bicycle or motorcycle; to ride a bicycle
Example
He biked to school every day.
彼は毎日自転車で学校に行きました。
C2 noun /blɑːtʃ/

blotch

しみ
Meaning
a large, irregular spot or stain, often on skin or fabric
Example
His shirt had a red blotch from the spilled juice.
彼のシャツにはこぼれたジュースで赤いしみがついていた。
B2 adjective /bɪˈheɪvjərəl/

behavioral

行動的
Meaning
relating to the way a person or animal acts
Example
The psychologist studied the child's behavioral patterns.
心理学者は子供の行動パターンを研究した。
C1 noun, verb /buːz/

booze

酒
Meaning
alcoholic drink, especially strong liquor; to drink alcohol, often excessively
Example
They bought some booze for the party.
彼らはパーティーのために酒を買った。
C1 noun /bəˈnæn.zə/

Bonanza

富、運、または利益の突然の増加を引き起こす状況や出来事
Meaning
a situation or event that creates a sudden increase in wealth, good fortune, or profits
Example
The oil discovery was a bonanza for the small country.
石油の発見は小さな国にとってボナンザでした。
C1 adjective /bəˈlɪdʒ.ər.ənt/

belligerent

好戦的または攻撃的
Meaning
Hostile and aggressive, ready to fight or argue.
Example
His belligerent attitude often leads to conflicts.
彼の好戦的な態度はしばしば衝突を引き起こします。
C1 adjective /ˈbrɪtl/

brittle

壊れやすい
Meaning
easily broken or cracked; hard but liable to break
Example
The glass was so brittle that it cracked easily.
ガラスはとても壊れやすくて、簡単に割れました。
C1 noun /ˈbɪɡ.ət/

bigot

偏見者
Meaning
A person who is intolerant toward those holding different opinions or beliefs.
Example
He was called a bigot for refusing to listen to others' views.
他人の意見を聞こうとしなかったため、彼は偏見者と呼ばれました。
B1 verb /briːð/

breathe

呼吸
Meaning
To take air into the lungs and send it out again.
Example
It was hard to breathe in the smoky room.
煙の部屋で呼吸するのは難しかった。
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 verb /ˈbækˌslaɪd/

backslide

後退
Meaning
To relapse into bad habits, undesirable practices, or moral decline.
Example
After months of progress, he began to backslide into old habits.
数ヶ月の進展の後、彼は古い習慣に戻り始めた。
A2 verb /beɪk/

bake

焼く
Meaning
to cook food using dry heat, usually in an oven
Example
She baked a cake for her friend's birthday.
彼女は友達の誕生日のためにケーキを焼きました。
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 /ˈbɔːbəl/

bauble

小さな装飾品
Meaning
A small, decorative trinket or ornament, often of little value.
Example
She wore a shiny bauble around her neck.
彼女は首に輝く小さな装飾品をつけていた。
B1 verb /braʊz/

browse

ブラウズする
Meaning
To look at or skim through casually, especially online or in a store
Example
She likes to browse books in the library.
彼女は図書館で本をブラウズするのが好きです。
B2 noun /ˈbæŋ.ɡəl/

Bangle

バングル
Meaning
a rigid bracelet or anklet worn as jewelry
Example
She wore beautiful gold bangles on her wrists.
彼女は腕に美しい金のバングルを着けていた。
C1 noun/verb /ˈbɔɪ/ or /ˈbuːi/

buoy

ブイ, 浮かべる
Meaning
A floating marker on water; to keep something afloat or encourage someone.
Example
The news buoyed their spirits after the loss.
ニュースは喪失後、彼らの気持ちを高めました。
A2 noun /ˈbætəri/

battery

バッテリー
Meaning
A device that stores and provides electrical energy; also refers to a group of similar things or repeated blows.
Example
The phone battery ran out after a long day.
電話のバッテリーは長い一日の後に切れました。
A1 adjective /ˈbɪzi/

busy

忙しい
Meaning
actively engaged in work or activity; occupied
Example
He is too busy to answer the phone.
彼は電話に出るのがあまりにも忙しい。
B2 noun/verb /bʌst/

bust

Meaning
As a noun: A sculpture of a person's head, shoulders, and chest; As a verb: To break, smash, or arrest.
Example
The police busted the gang last night.
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。
C1 noun /ˈbɪtər ɡɔːrd/

Bitter Gourd

ゴーヤ
Meaning
a green, bumpy vegetable with a very bitter taste, known for its medicinal properties
Example
Bitter gourd is excellent for controlling blood sugar levels.
ゴーヤは血糖値をコントロールするのに優れています。
B1 adverb /ˈbraɪtli/

brightly

明るく
Meaning
in a way that gives off a lot of light; in a vivid, cheerful, or intelligent manner
Example
The stars shone brightly in the clear night sky.
澄んだ夜空に星が明るく輝いていた。
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.
B2 adjective /ˌbaɪˈlɪŋɡwəl/

bilingual

バイリンガル
Meaning
Able to speak two languages fluently.
Example
She grew up in a bilingual household speaking both English and Spanish.
彼女はバイリンガルの家庭で育ち、英語とスペイン語の両方を話しました。
C1 noun /beɪn/

bane

災い
Meaning
A cause of great distress, harm, or annoyance.
Example
Traffic jams are the bane of city life.
交通渋滞は都市生活の災いです。
C2 noun /ˈbroʊmaɪd/

bromide

ありきたりなアイデア
Meaning
A trite or unoriginal idea or remark; also a chemical compound of bromine.
Example
His speech was full of old bromides about hard work.
彼のスピーチは、努力についての古いありきたりなアイデアでいっぱいだった。
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 /ˌbeɪˈliː/

bailee

受寄者
Meaning
a person or party who temporarily receives possession of goods or property from another under a legal agreement
Example
The bailee must take reasonable care of the goods while they are in his possession.
受寄者は財産を適切に管理する義務がある。
C2 adjective /ˈboʊvaɪn/

bovine

牛に関連する
Meaning
relating to cattle; showing a dull or sluggish nature
Example
Her bovine expression revealed no emotions.
彼女のボバインな表情は感情を示すことはなかった。