C2 adjective/noun /fɪˈduː.ʃi.er.i/

fiduciary

信託の

Meaning

Involving trust, especially with regard to the relationship between a trustee and a beneficiary.

Example

Banks have fiduciary duties towards their clients.

銀行は顧客に対して信託義務を負っています。

C2 adverb /ˈfɔːrbi/

forby

その上

Meaning

In addition; besides (archaic Scottish/English word).

Example

He is kind and generous, and wise forby.

彼は親切で寛大で、さらに賢いです。

B1 adjective /ˈflek.sə.bəl/

Flexible

柔軟な; 変更に適応可能

Meaning

able to bend easily; adaptable to change; not rigid

Example

She has a flexible work schedule that allows her to work from home.

彼女は自宅で働ける柔軟な仕事のスケジュールを持っています。

C1 noun /ˈfɛtɪʃ/

fetish

過度または不合理な執着

Meaning

an excessive or irrational devotion to something

Example

He has a fetish for collecting rare stamps.

彼は珍しい切手を集めることに執着しています。

C2 noun /fləˈtɪlə/

flotilla

小型艦隊

Meaning

A small fleet of ships or boats operating together.

Example

A flotilla of fishing boats left the harbor at dawn.

漁船のフロティラが夜明けに港を出発しました。

B1 adjective /ˈfluː.ənt/

Fluent

流暢; 熟練

Meaning

able to speak a language easily and accurately; flowing smoothly and gracefully

Example

She is fluent in three languages including English and French.

彼女は英語とフランス語を含む3つの言語に堪能です。

A1 noun /fʌn/

fun

楽しみ

Meaning

enjoyment, amusement, or light-hearted pleasure

Example

We had a lot of fun at the party.

パーティーでとても楽しみました。

C2 noun /floʊ/

floe

氷の板

Meaning

a large sheet of floating ice

Example

The polar bears rested on the ice floe.

北極熊は氷の板の上で休んでいた。

C1 verb /fret/

fret

心配する

Meaning

to worry or be anxious; to be troubled

Example

Don't fret about the exam results.

試験結果について心配しないでください。

C2 noun /feɪt/

fete

祭り、フェスティバル

Meaning

a celebration or festival, often in honor of someone

Example

The village held a grand fete to celebrate the harvest.

村は収穫を祝うために盛大な祭りを開催しました。

C1 noun /fiˈæs.koʊ/

fiasco

完全な失敗

Meaning

a complete failure, especially a ludicrous or humiliating one

Example

The event turned into a complete fiasco due to poor planning.

計画の悪さからそのイベントは完全な失敗に終わった。

B2 noun /ˈfaʊn.dər/

Founder

創設者

Meaning

a person who establishes an institution or settlement; someone who starts or creates something

Example

Steve Jobs was the co-founder of Apple Inc. and revolutionized personal computing.

スティーブ・ジョブズはApple Inc.の共同創設者で、個人用コンピュータを革新しました。

B1 verb /ˈfraɪtən/

frighten

怖がらせる

Meaning

to cause fear or alarm in someone

Example

The loud noise frightened the child.

大きな音が子供を怖がらせた。

A2 noun /ˈfoʊldər/

folder

フォルダー

Meaning

a container or directory used to store and organize papers or digital files

Example

I saved all the photos in a separate folder.

すべての写真を別のフォルダーに保存しました。

A2 noun /fæn/

Fan

ファン; 愛好者; 扇風機

Meaning

a person who has a strong interest in or admiration for a particular person or thing; a device for creating air current

Example

She is a huge fan of classical music and attends every concert in the city.

彼女はクラシック音楽の大ファンで、市内のすべてのコンサートに参加しています。

C1 noun /ˈfren.zi/

Frenzy

熱狂

Meaning

a state or period of uncontrolled excitement or wild behavior; intense activity

Example

The announcement of the sale created a shopping frenzy at the mall.

セールの発表はショッピングの熱狂を引き起こしました。

B2 adverb /ˈfeɪθ.fəl.i/

Faithfully

忠実に

Meaning

in a loyal and steadfast manner; with dedication

Example

She faithfully attended every meeting despite her busy schedule.

彼女は忙しいスケジュールにもかかわらず、毎回忠実に会議に出席しました。

C1 adjective /ˈfaɪ.naɪt/

Finite

有限な; 限界がある

Meaning

limited; having bounds or limits; not infinite

Example

Earth has finite natural resources.

地球には有限の自然資源があります。

A2 adjective /ˈfraɪtənd/

frightened

怯えた

Meaning

feeling fear or anxiety; scared

Example

The child was frightened by the loud noise.

その子供は大きな音に怯えた。

B1 verb /floʊt/

float

浮かぶ

Meaning

to rest or move on the surface of a liquid or in the air without sinking

Example

The boat began to float gently down the river.

ボートは静かに川を下って浮かび始めました。

A1 noun /flɔːr/

floor

床

Meaning

the lower surface of a room, on which one may walk

Example

The floor was covered with a soft carpet.

床は柔らかいカーペットで覆われていました。

A1 verb /feɪs/

face

直面する

Meaning

to confront or deal with; to turn toward; to have the front in a particular direction

Example

She had to face many challenges in her new job.

彼女は新しい仕事で多くの課題に直面しなければならなかった。

C2 adjective /ˈfæð.əm.ləs/

fathomless

理解不可能な、または測定不可能な; 非常に深い

Meaning

impossible to understand or measure; very deep

Example

The ocean seemed fathomless as it stretched to the horizon.

海は地平線まで広がると、測り知れないように見えました。

C1 noun /fjuːd/

feud

争い, 敵意

Meaning

a prolonged and bitter quarrel or conflict, often between families or groups

Example

The two families have been in a feud for generations.

二つの家族は世代を超えて争い続けています。

C1 adjective /fɪkˈtɪʃəs/

fictitious

虚構の、偽の

Meaning

not real or true; imaginary or fabricated

Example

The story he told was entirely fictitious.

彼が話した話は完全に虚構だった。

C2 noun /ˌfjuːzɪˈleɪd/

fusillade

集中射撃

Meaning

A series of shots fired or missiles thrown all at the same time or in quick succession.

Example

The soldiers advanced under a fusillade of bullets.

兵士たちは集中射撃の中で前進した。

C1 verb /flaʊt/

flout

無視する

Meaning

To openly disregard or show contempt for a rule or law.

Example

The company was fined for flouting environmental regulations.

その会社は環境規制を無視したため罰金を科せられました。

B1 noun /ˈfæktər/

factor

要因

Meaning

A circumstance, fact, or influence that contributes to a result.

Example

Weather is an important factor in crop production.

天候は作物生産において重要な要因です。

B2 noun /ˈfræk.ʃən/

Fraction

分数; 部分

Meaning

a numerical quantity that is not a whole number; a small or tiny part of something

Example

Only a small fraction of the population voted in the local election.

地方選挙で投票したのは人口のごく一部に過ぎなかった。

C1 adjective /fəˈnætɪkəl/

fanatical

熱狂的な

Meaning

showing extreme enthusiasm or obsession

Example

She has a fanatical interest in collecting vintage stamps.

彼女は古い切手を集めることに熱狂的な興味を持っています。

C1 noun/verb ˈfɒr.ɪdʒ

forage

飼料、食べ物を探す

Meaning

Food for horses and cattle, especially dried hay or feed; to search for food.

Example

Animals forage for food during the winter months.

動物たちは冬の間に食べ物を探します。

B1 adjective /ˈfæbjələs/

Fabulous

素晴らしい; 驚くべき; 非凡な

Meaning

extremely good; wonderful; extraordinary

Example

She wore a fabulous dress to the party.

彼女はパーティーに素晴らしいドレスを着ていた。

A1 adjective /ˈfrɛndli/

friendly

幸福

Meaning

Kind and pleasant; showing goodwill and affection.

Example

The shop owner is very friendly to new customers.

彼女は賞を受け取ったとき、幸せを隠すことができませんでした。

C2 adjective /ˈfʌsti/

fusty

かび臭い、古臭い

Meaning

smelling stale, damp, or stuffy; old-fashioned

Example

The room smelled fusty after being closed for months.

部屋は数ヶ月間閉め切られていた後、かび臭くなった。

A2 noun /fækt/

fact

事実

Meaning

A thing that is known or proved to be true

Example

It is a fact that the Earth orbits the Sun.

地球が太陽の周りを回っているのは事実です。

A1 adjective /fjuː/

few

少数

Meaning

A small number of; not many.

Example

Only a few students attended the class.

ほんの少しの学生がクラスに出席しました。

B1 adjective /ˈfæʃənəbəl/

fashionable

流行の

Meaning

Following the latest styles or trends in clothing, behavior, or ideas

Example

She always wears fashionable clothes to every party.

彼女は毎回のパーティーで常にファッショナブルな服を着ています。

B1 noun /ˈflaʊər veɪs/

Flower-vase

花瓶

Meaning

a decorative container used to hold cut flowers

Example

She placed beautiful roses in the flower vase on the table.

彼女はテーブルの上に花瓶に美しいバラを置きました。

C1 noun /ˈfeɪvərɪtɪzəm/

favoritism

えこひいき

Meaning

the practice of giving unfair preferential treatment to one person or group

Example

The manager was accused of favoritism towards certain employees.

マネージャーは特定の従業員に対する偏愛で告発されました。

B1 adjective /ˈfrʌstreɪtɪd/

frustrated

フラストレーション

Meaning

feeling annoyed or upset because of inability to achieve something

Example

She felt frustrated after failing the exam.

彼女は試験に失敗した後、フラストレーションを感じました。

C2 noun /feɪnt/

feint

フェイント, 偽りの動き

Meaning

a deceptive or pretended movement, especially in fighting or sports

Example

The boxer made a feint to the left before striking to the right.

ボクサーは右に打つ前に左にフェイントをかけました。

C2 verb /fleɪl/

flail

何かを激しく振る; 必死に動く

Meaning

to wave or swing something about wildly; to thrash about

Example

He flailed his arms to keep afloat in the water.

彼は水に浮かぶために腕を振った。

C1 adjective /ˈfɛrəl/

feral

野生の

Meaning

existing in a wild or untamed state; not domesticated

Example

The feral cat roamed the streets at night.

その野良猫は夜に街を歩き回っていた。

C1 noun /fɪkˈseɪ.ʃən/

fixation

執着や過度な興味

Meaning

An obsessive interest in or feeling about someone or something.

Example

His fixation on perfectionism delayed project completion.

完璧主義への執着がプロジェクトの完了を遅らせた。

C2 adjective/adverb /feɪn/

fain

喜んで、喜んで

Meaning

gladly, willingly, or with pleasure

Example

I would fain help you if I had the time.

もし時間があれば、喜んであなたを助けます。

C1 adjective /ˌfʊl ˈbɒd.id/

full-bodied

濃厚な味わい

Meaning

Having a strong, rich, and robust quality, especially of wine, coffee, or voice.

Example

He prefers a full-bodied red wine with his dinner.

彼は夕食に濃厚な味わいの赤ワインを好みます。

C1 noun /ˈfræk.tʃər/

Fracture

骨折; 骨のひび割れ

Meaning

the cracking or breaking of a hard object or material; a break in a bone

Example

The doctor confirmed that he had a hairline fracture in his wrist.

医者は彼の手首に髪の毛のような骨折があることを確認しました。

C2 verb /ˈfɜːrbɪʃ/

furbish

磨く

Meaning

to polish, renovate, or give a fresh look to something

Example

The workers furbished the old sword until it gleamed like new.

作業員たちは古い剣を磨き、それが新しいかのように輝くまでしました。

C1 noun /ˈflæt.ər.i/

Flattery

お世辞

Meaning

excessive and insincere praise, given especially to further one's own interests

Example

His constant flattery made everyone suspicious of his true motives.

彼の絶え間ないお世辞は、皆が彼の本当の意図を疑わせることになった。

B2 noun /ˈfleɪvər/

flavor

味

Meaning

The distinctive taste of a food or drink.

Example

This ice cream has a delicious mango flavor.

このアイスクリームはおいしいマンゴーのフレーバーがあります。

B1 noun /flæʃ/

Flash

フラッシュ; ひらめき

Meaning

a sudden brief burst of bright light; a very brief moment

Example

There was a bright flash of lightning followed by thunder.

雷鳴の後に明るい閃光がありました。

B2 noun ˈfjuː.tʃɚ ˌdʒen.əˈreɪ.ʃənz

future generations

未来の世代

Meaning

People who have not yet been born, considered in terms of the environment or society they will inherit.

Example

Sustainable development ensures a better life for future generations.

持続可能な開発は未来の世代のためにより良い生活を保証します。

A2 adjective, noun /ˈfeɪvərɪt/

favorite

お気に入り

Meaning

Preferred over all others; something or someone especially liked.

Example

Chocolate is my favorite ice cream flavor.

チョコレートは私のお気に入りのアイスクリームのフレーバーです。

C1 noun /frɪˈvɒləti/

frivolity

軽薄さ

Meaning

Lack of seriousness; silly or trivial behavior.

Example

The teacher discouraged frivolity during the exam.

先生は試験中の軽薄な行動を戒めました。

B1 noun /ˈfeɪ.vər/

Favour

好意; 手伝い; 親切

Meaning

approval, support, or liking for someone or something; a kind or helpful act

Example

Could you do me a favour and help me move this heavy box?

この重い箱を動かす手伝いをしてくれませんか？

C1 noun /fəˌsɪlɪˈteɪʃən/

facilitation

容易化

Meaning

The action of facilitating or making an action or process easier or helping bring about an outcome.

Example

Her facilitation made the meeting run smoothly.

彼女のファシリテーションにより、会議はスムーズに進行しました。

A2 verb /fɪl/

fill

満たす

Meaning

to make or become full; to put something into a container until it is full

Example

Please fill the glass with water.

グラスに水を注いでください。

C2 noun /ˈfɜːrnəri/

fernery

シダ植物の栽培所、シダを育てる場所

Meaning

a place or greenhouse where ferns are cultivated

Example

The garden's fernery was full of exotic plants.

庭のファーネリーは珍しい植物でいっぱいだった。

A2 noun /fɔːrk/

Fork

フォーク

Meaning

a tool with two or more prongs used for eating or serving food

Example

Please use a fork to eat your salad.

サラダを食べるためにフォークを使ってください。

C1 noun /ˈfʌŋɡəs/

fungus

菌類

Meaning

a spore-producing organism feeding on organic matter, including molds, yeast, and mushrooms

Example

A strange fungus was growing on the old tree.

古い木に奇妙な菌類が生えていました。

C1 noun /ˈfɔːrdʒəri/

forgery

偽造

Meaning

the crime of making fake documents, money, or artworks

Example

The bank detected a forgery in the signature on the cheque.

銀行は小切手の署名に偽造を発見しました。

B2 noun /ˈfʌndˌreɪzɪŋ/

fundraising

資金調達

Meaning

the process of collecting money for a cause or project

Example

The organization is organizing a fundraising event.

その組織は資金調達イベントを開催しています。

B1 noun /ˈfaɪn.dɪŋ/

finding

発見、調査後に得られた結論または結果

Meaning

a discovery, conclusion, or result reached after investigation

Example

The scientist published her findings in a leading journal.

科学者は彼女の発見を主要なジャーナルに発表しました。

C1 noun /ˈfɔːls.hʊd/

Falsehood

虚偽; 嘘

Meaning

the state of being untrue; a lie

Example

The politician was caught spreading falsehoods about his opponent.

その政治家は対立候補について虚偽を広めているところを見つかった。

C1 noun ˌflʌk.tʃuˈeɪ.ʃən

fluctuation

変動

Meaning

An irregular rising and falling in number or amount; a variation.

Example

The stock market experiences frequent fluctuation.

株式市場は頻繁に変動します。

B2 noun /ˈfɜːrneɪs/

furnace

炉

Meaning

an enclosed structure in which heat is produced for a building or for melting metal

Example

The factory's furnace melted the metal quickly.

工場の炉は金属を迅速に溶かしました。

C2 verb /flɛdʒ/

fledge

飛べるようになる

Meaning

To develop wing feathers large enough for flight; to bring up until able to fly.

Example

The young birds will fledge in a few weeks.

若い鳥たちは数週間以内に飛べるようになる。

B2 noun /ˈfaʊn.tən/

Fountain

噴水

Meaning

a natural spring of water; an artificial structure from which water flows

Example

The fountain in the park attracts many visitors.

公園の噴水は多くの訪問者を引き寄せます。

A2 noun /ˈfɪt.nəs/

fitness

フィットネス

Meaning

The condition of being physically fit and healthy, or the quality of being suitable to fulfill a particular role or task.

Example

Fitness tests ensure vehicle safety.

フィットネステストは車両の安全を確保します。

C1 adjective /ˈfræɡməntɪd/

fragmented

断片化, 分割, 不完全

Meaning

Having been broken into fragments; disjointed or incomplete.

Example

The information was fragmented and difficult to understand.

情報は断片化されていて、理解するのが難しかった。

B2 verb /ˈfɜːrnɪʃ/

furnish

家具を設置する、提供する

Meaning

to provide or supply with furniture or equipment

Example

They furnished the new house with modern furniture.

彼らは新しい家に現代的な家具を備えました。

C1 noun /fɔːrˈkloʊʒər/

foreclosure

差し押さえ

Meaning

The legal process by which a lender takes control of a property from a borrower who has failed to make payments.

Example

The family lost their home due to foreclosure after missing several mortgage payments.

その家族は複数回のモーゲージ支払いを逃したため、差し押さえで家を失いました。

B2 adverb /ˈfræŋkli/

Frankly

率直に; 正直に;

Meaning

honestly; openly; in a direct manner

Example

Frankly, I think this plan needs more consideration.

率直に言うと、この計画にはもっと考慮が必要だと思います。

C2 adjective /ˈfrəʊərd/

froward

頑固な

Meaning

Difficult to deal with; contrary and disobedient.

Example

The teacher found the froward child hard to manage.

教師は頑固な子供を扱うのが難しいと感じた。

C1 noun, verb /ˈfrænʧaɪz/

franchise

フランチャイズ

Meaning

A legal right to sell or distribute goods or services in a specific area; to grant such a right.

Example

He opened a new fast-food franchise in the city.

彼は都市で新しいファーストフードのフランチャイズを開設しました。

B1 noun /fæts/

fats

脂肪

Meaning

Essential macronutrients that provide energy, support cell growth, and protect organs while helping absorb vitamins.

Example

Healthy fats from nuts and avocados support brain function.

ナッツとアボカドから得られる健康的な脂肪は、脳機能をサポートします。

C2 noun /foʊ ˈpɑː/

faux pas

社会的な失敗

Meaning

a social blunder or mistake in etiquette

Example

He committed a major faux pas by forgetting her birthday.

彼は彼女の誕生日を忘れて大きな社会的な失敗を犯した。

C2 noun /ˈfɪlɪɡri/

filigree

繊細な装飾細工、通常は金または銀で作られた

Meaning

delicate ornamental work of fine wire, usually of gold or silver

Example

The necklace was decorated with intricate gold filigree.

ネックレスは複雑な金のフィリグリーで飾られていました。

C1 noun /ˈfrek.əl/

Freckle

そばかす

Meaning

a small brownish spot on the skin, often becoming more pronounced through exposure to the sun

Example

Her face was covered with cute freckles that appeared every summer.

彼女の顔は可愛いそばかすで覆われていて、毎年夏になると現れます。

B2 noun /ˈfɪlmˌmeɪkər/

film-maker

映画製作者

Meaning

A person who directs or produces films

Example

The film-maker received an award for his latest documentary.

映画製作者は最新のドキュメンタリーで賞を受賞しました。

B2 adjective /ˈfraɪtfəl/

frightful

恐ろしい

Meaning

causing fear or horror; very unpleasant

Example

The hikers faced frightful weather conditions on the mountain.

登山者たちは山で恐ろしい天候条件に直面しました。

B1 noun /ˈfjuː.əl/

Fuel

燃料

Meaning

a material such as coal, gas, or oil that is burned to produce heat or power

Example

The rising cost of fuel has affected transportation and heating expenses worldwide.

燃料の価格上昇は、世界中の輸送と暖房費に影響を与えました。

C1 verb /feɪn/

feign

装う、ふりをする

Meaning

to pretend or fake; to give a false appearance of

Example

She feigned illness to avoid going to work.

彼女は仕事に行かないために病気を装った。

B2 noun/adjective /ˈfluːɪd/

fluid

流体

Meaning

a substance that can flow easily, such as liquid or gas; smooth and adaptable

Example

The artist's fluid movements impressed the audience.

アーティストの流れるような動きは観客を感動させました。

A2 noun /ˈfɑːr.mər/

Farmer

農家

Meaning

a person who grows crops or raises animals for food or profit

Example

The farmer planted rice in the fertile fields this season.

This season, the farmer planted rice in the fertile fields.

C1 adjective /ˈfruːt.ləs/

Fruitless

無駄な; 実を結ばない; 無益な;

Meaning

unsuccessful; futile; pointless;

Example

After hours of searching, their efforts proved fruitless.

数時間の探索の後、彼らの努力は無駄であることが証明されました。

C2 noun /ˈfuːləri/

foolery

愚かさ

Meaning

Silly or foolish behavior or actions.

Example

His constant foolery made the meeting hard to take seriously.

彼の絶え間ない愚かさは、会議を真剣に受け止めるのを難しくしました。

A1 noun /faɪv/

five

五

Meaning

The number 5; one more than four and one less than six.

Example

She bought five apples from the market.

彼女は市場で五つのリンゴを買いました。

C1 noun ˈfæl.ə.si

fallacy

誤り, 偽りの信念, 誤った推論

Meaning

False belief, misconception, false reasoning.

Example

The idea that success comes easy is a fallacy.

成功が簡単に得られるという考えは誤りです。

B2 noun /flɔː/

flaw

欠陥

Meaning

a defect or imperfection in something

Example

The diamond had a small flaw that was barely visible.

ダイヤモンドにはほとんど見えない小さな欠陥がありました。

B2 adverb /fɔːrθ/

forth

forward in place, time, or order

Example

The leader stepped forth to address the crowd.

リーダーは群衆に向かって前に出ました。

C1 verb/noun ˈfæð.əm

fathom

理解する

Meaning

To understand after much thought; to measure the depth of water; to comprehend.

Example

It is difficult to fathom the depths of the ocean.

海の深さを理解するのは難しい。

Meaning

The woolly covering of a sheep; as a verb, to swindle or cheat someone.

Example

The farmer sheared the sheep’s fleece carefully.

A1 adjective /fɜːrst/

first

最初

Meaning

coming before all others in time, order, or importance

Example

She was the first to arrive at the meeting.

彼女は会議に最初に到着した。

C1 adjective /ˈfuːlpruːf/

foolproof

失敗しない

Meaning

Designed to be very easy to use or understand, leaving no possibility of failure or error.

Example

The new software has a foolproof installation process.

新しいソフトウェアには失敗しないインストールプロセスがあります。

B1 noun fʌnd

fund

基金

Meaning

A sum of money saved or made available for a particular purpose.

Example

The government allocated a fund for disaster relief.

政府は災害救援のために基金を割り当てました。

B2 adjective /ˈfʌŋkʃənl/

functional

機能的

Meaning

designed to be practical and useful, rather than just decorative

Example

The design of the chair is simple but highly functional.

椅子のデザインはシンプルですが、非常に機能的です。

C2 verb /frɪsk/

frisk

ボディチェックする

Meaning

To search a person by patting their clothing to check for concealed items.

Example

The security guard frisked the man at the entrance.

セキュリティガードは入口でその男性をフリスクしました。

A1 adverb /fɑːr/

far

遠い

Meaning

at, to, or by a great distance

Example

The school is far from my house.

学校は私の家から遠いです。

C1 noun /frɪndʒ/

fringe

装飾的縁 / 端

Meaning

A decorative border of threads; the outer edge or margin of something.

Example

The festival had a fringe of small independent performances.

フェスティバルには小さな独立したパフォーマンスの端がありました。

A2 adjective /ˈflaɪɪŋ/

flying

飛んでいる

Meaning

able to move through the air; related to flight or aircraft

Example

The flying bird disappeared into the clouds.

飛んでいる鳥は雲の中に消えました。

C1 noun /ˈfɔːrmən/

foreman

労働者のグループを担当する人、特に工場や建設現場で

Meaning

a person in charge of a group of workers, especially in a factory or construction site

Example

The foreman supervised the workers on the construction site.

フォアマンは建設現場で作業員を監督しました。

C1 verb /flɪntʃ/

flinch

ひるむ

Meaning

to suddenly move back or away due to fear or pain

Example

He didn’t flinch when the doctor gave him the injection.

彼は医者が注射をする時、ひるむことはなかった。