C2 adjective /ˈfraɪəbl/

friable

もろい

Meaning

Easily crumbled or reduced to powder.

Example

The old brick wall was friable and broke apart at a touch.

古いレンガの壁はもろく、触れると壊れました。

C2 noun /ˈfetiʃ/

fetich

フェティッシュ

Meaning

an object believed to have magical powers or to be inhabited by a spirit

Example

The villagers treated the statue as a powerful fetich.

村人たちはその像を強力なフェティッシュとして扱っていました。

B2 noun /fraɪt/

Fright

恐怖; 驚き; 驚愕

Meaning

a sudden intense feeling of fear; a shock or surprise that causes fear

Example

The loud thunder gave her such a fright that she dropped her coffee cup.

大きな雷の音で、彼女は恐怖を感じてコーヒーカップを落としました。

B2 adjective /ˈfeɪvərəbəl/

favorable

好ましい

Meaning

expressing approval or support; advantageous

Example

The weather conditions were favorable for the outdoor event.

屋外イベントには好ましい天候でした。

C1 adjective /ˈflɪmzi/

flimsy

弱々しい

Meaning

weak, fragile, or lacking in strength; not convincing

Example

The chair was too flimsy to support his weight.

その椅子は重さを支えられないほど弱々しかった。

C1 verb /ˈfæbrɪkeɪt/

fabricate

作り上げる

Meaning

to invent or concoct something, often with the intent to deceive; or to construct or manufacture

Example

The witness fabricated his testimony to protect himself.

証人は自分を守るために証言をでっち上げました。

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。

C2 noun /ˈfriːˌbuːtər/

freebooter

海賊

Meaning

A pirate or plunderer who roams freely in search of wealth.

Example

The freebooter raided the merchant ships along the coast.

海賊は沿岸の商船を襲った。

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。

B1 adverb /ˈfɜːrstli/

firstly

まず

Meaning

used to introduce the first point or reason in a discussion or argument

Example

Firstly, we need to address the budget issue before proceeding.

まず、予算の問題に対処する必要があります。

C1 noun /ˈfaɪər.wɔːl/

firewall

ファイアウォール

Meaning

A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

Example

A firewall protects networks from cyber-attacks.

ファイアウォールはネットワークをサイバー攻撃から守ります。

C2 noun /ˈfrækɑː/

fracas

騒動

Meaning

A noisy disturbance or quarrel.

Example

The fracas outside the bar drew the attention of the police.

バーの外での騒動が警察の注意を引きました。

C2 adjective /ˈfluːtɪd/

fluted

溝が入った

Meaning

having grooves or ridges, often for decoration

Example

The vase had a beautiful fluted design around the rim.

その花瓶は縁に美しい溝が入ったデザインがありました。

B2 noun /ˌfer.ˈwel/

Farewell

さようなら

Meaning

an act of parting or of marking someone's departure

Example

The company organized a farewell party for the retiring manager.

会社は退職するマネージャーのためにさようならパーティーを開催しました。

A1 noun/verb /fɪlm/

film

映画

Meaning

a motion picture or movie; or to record on camera

Example

They watched a film together on the weekend.

彼らは週末に一緒に映画を見ました。

B1 noun /ˈfɛloʊ/

fellow

仲間

Meaning

a person who shares a common situation, interest, or activity with another

Example

He is a fellow student in my class.

彼は私のクラスの仲間です。

C2 adjective /ˈfɛkləs/

feckless

無能な, 責任感のない

Meaning

lacking initiative or strength of character; irresponsible

Example

His feckless attitude at work caused several missed deadlines.

彼の無能な態度が仕事でいくつかの期限を逃す原因となった。

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 noun /ˈfɔːrsəm/

foursome

四人組

Meaning

a group of four people or things, especially in games or social activities

Example

The foursome enjoyed a game of golf together.

四人組は一緒にゴルフを楽しみました。

A1 preposition /fɔːr/

for

のために

Meaning

used to indicate purpose, destination, or recipient

Example

This gift is for you.

このギフトはあなたのためです。

C2 adjective /ˈfʊl.səm/

fulsome

過剰な賞賛

Meaning

Excessively flattering or insincere; abundant or generous in amount.

Example

He offered fulsome praise to his boss.

彼は上司に過剰な賞賛を提供しました。

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 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 /flæt fɪʃ/

Flat fish

カレイ

Meaning

a type of fish with a flattened body that lives on the sea floor

Example

Flat fish like sole and flounder are excellent for grilling.

カレイやヒラメのようなフラットフィッシュはグリルに最適です。

B1 noun /ˈfaɪ.tər/

Fighter

戦闘機

Meaning

a military aircraft designed for attacking other aircraft; a person who fights

Example

The fighter jet flew overhead during the military parade.

戦闘機は軍事パレードの間に私たちの頭上を飛びました。

C2 noun /flæks/

flax

フラックス

Meaning

a plant whose fibers are used to make linen and whose seeds are edible

Example

Flax is often used in making linen fabrics.

フラックスは、リネン生地を作るために頻繁に使用されます。

C2 noun /ˈfɛndər/

fender

フェンダー

Meaning

a part of a vehicle that frames a wheel well to protect against mud or debris

Example

The car's fender was dented in the accident.

車のフェンダーは事故でへこんでしまいました。

B1 noun/verb /ˈfaɪtɪŋ/

fighting

戦い

Meaning

the act of engaging in a physical or verbal conflict

Example

The soldiers were fighting bravely on the battlefield.

兵士たちは戦場で勇敢に戦っていました。

B2 adjective /ˈfæktʃuəl/

Factual

事実に基づいた; 真実の

Meaning

based on facts; accurate; true

Example

The report contains only factual information.

レポートには事実に基づく情報のみが含まれています。

C1 noun /ˈfɔːrˌbɛərz/

forebears

先祖

Meaning

Ancestors or people in previous generations from whom one is descended.

Example

We must honor the traditions of our forebears.

私たちは先祖の伝統を尊重しなければなりません。

B2 noun fəˈtiːɡ

fatigue

疲労

Meaning

Physical or mental exhaustion due to prolonged exertion or mental stress

Example

Lack of sleep leads to extreme fatigue.

睡眠不足は極度の疲労を引き起こします。

C1 adjective /fəˈnætɪk/

Fanatic

熱狂的な

Meaning

extremely passionate about something; showing excessive enthusiasm or devotion

Example

He is a fanatic supporter of his football team.

彼はサッカーチームの熱狂的なサポーターです。

B1 adjective /fɒnd/

fond

好き

Meaning

having a strong liking or affection for something or someone

Example

She is fond of painting and spends hours in front of her canvas.

彼女は絵を好きで、キャンバスの前で何時間も過ごします。

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。

C2 adjective /ˈfʊl.dʒənt/

fulgent

輝かしい

Meaning

Shining brightly; dazzling.

Example

The fulgent stars lit up the night sky.

輝かしい星々が夜空を照らした。

C1 adjective /ˌfɑːrˈfɛtʃt/

far-fetched

信じがたい

Meaning

unlikely to happen or be true; improbable

Example

His explanation for being late was a bit far-fetched.

彼の遅刻の理由は少し信じがたいものでした。

C2 adjective /fəˈlɪsɪtəs/

felicitous

適切な、ふさわしい、または楽しい; 幸運や幸福で特徴付けられる

Meaning

well-chosen, appropriate, or pleasing; marked by good fortune or happiness

Example

She made a felicitous remark that lightened the mood.

彼女は気分を軽くする適切なコメントをしました。

C2 adjective /fækˈtɪʃəs/

factitious

人工的な、真実ではない

Meaning

artificial or fabricated; not natural or genuine

Example

The excitement in his story seemed factitious and forced.

彼の話の興奮は人工的で強制的に見えました。

C1 noun /ˌfæb.rɪˈkeɪ.ʃən/

fabrication

虚偽の発明

Meaning

The invention of false or misleading information; a lie or falsehood.

Example

The article was full of fabrication and misleading claims.

その記事は虚偽の発明と誤解を招く主張で満ちていました。

C2 noun, verb /ˈfɪlɪˌbʌstər/

filibuster

議会での活動を長時間の演説で遅らせる戦術; この戦術を使用する

Meaning

a tactic of delaying legislative action by prolonged speech; to use such a tactic

Example

The senator filibustered for hours to prevent the bill from passing.

上院議員は法案を通すのを防ぐために何時間もフィリバスターを行った。

C2 verb /ˈfrɪzəl/

frizzle

食べ物をカリカリで縮れた状態にする

Meaning

to fry something until it becomes crisp and curled, or to make a sizzling noise

Example

The bacon began to frizzle in the pan.

ベーコンがフライパンでシズシズ音を立てながら焼け始めました。

C2 noun /ˈfɔːrˌpiːk/

forepeak

船首の部屋

Meaning

The compartment in the forward part of a ship, often used for storage.

Example

The sailors stored extra ropes in the forepeak.

船員たちは余分なロープを船首の部屋に収納しました。

B2 verb /flɪk/

flick

素早く叩く

Meaning

to move or cause to move with a sudden quick motion

Example

He flicked the switch to turn on the light.

彼はライトをつけるためにスイッチをフリックしました。

A1 adjective/noun /fɔːrθ/

fourth

第四

Meaning

Constituting number four in a sequence; coming after the third in position.

Example

He finished in fourth place in the race.

彼はレースで第四位になった。

A2 verb /fiːd/

feed

餌を与える

Meaning

to give food to a person or animal

Example

She feeds the birds every morning.

彼女は毎朝鳥に餌を与えます。

C1 verb /fɔːrˈtɛl/

foretell

予知する

Meaning

to predict or announce something before it happens

Example

The old man claimed he could foretell the future.

その老人は未来を予知できると主張した。

C1 verb /ˈfrɒlɪk/

frolic

楽しげに遊ぶ

Meaning

to play and move about cheerfully, energetically, or playfully

Example

The children frolicked in the garden all afternoon.

子供たちは午後中庭で楽しげに遊んでいました。

C2 noun /ˈfæn.feər/

fanfare

大々的な展示, 宣伝

Meaning

a short ceremonial tune or display of publicity to attract attention

Example

The new product was launched with much fanfare.

新しい製品は盛大なファンファーレで発売されました。

B2 noun /ˈfreʃmən/

freshman

一年生

Meaning

a first-year student at a high school, college, or university

Example

The freshman felt nervous on his first day at university.

一年生は大学での初日に緊張していました。

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。

C2 noun /ˈfɪɡmənt/

figment

虚構, 想像

Meaning

something invented or imaginary; a fabrication of the mind

Example

The story of the haunted house is just a figment of her imagination.

幽霊屋敷の話は、彼女の想像の産物に過ぎない。

C2 adjective /ˈfiːbraɪl/

febrile

発熱の、興奮した

Meaning

having or showing the symptoms of a fever; or highly excitable or agitated

Example

The patient was in a febrile state with high temperature.

患者は高い温度の熱の状態にありました。

C2 adjective /ˈflaɪti/

flighty

不安定

Meaning

unstable, impulsive, or easily distracted; lacking seriousness or stability

Example

She’s too flighty to stick with one job for long.

彼女は一つの仕事に長く留まるには不安定すぎる。

C1 noun /fiːnd/

fiend

悪魔, 邪悪な人

Meaning

an evil spirit or demon; a wicked or cruel person; someone obsessed with a particular thing

Example

He is a real fiend when it comes to solving puzzles.

パズルを解くとき、彼は本当に悪魔のようです。

C2 noun /ˈfaɪnəri/

finery

高級または装飾的な服

Meaning

expensive or elaborate clothes, decorations, or accessories

Example

She attended the party in her finest finery.

彼女は最上の衣装でパーティーに出席した。

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 fəˈtɪl.ɪ.ti

fertility

肥沃

Meaning

The quality of being fertile; fruitfulness.

Example

Fertility of the soil is crucial for farming.

土壌の肥沃度は農業にとって重要です。

C1 verb /fɔrˈstɔl/

forestall

事前に防ぐ

Meaning

to prevent by acting in advance; to anticipate and counter

Example

They forestalled the crisis by taking immediate action.

彼らは即座に行動することで危機を回避した。

C1 noun /fɪˈnænʃɪər/

financier

金融家

Meaning

a person who manages large amounts of money or investments

Example

The financier advised the company on its investments.

金融家は会社に投資に関するアドバイスをしました。

C1 noun /ˌfɜːrmənˈteɪʃən/

fermentation

発酵、酵母または細菌による化学変化

Meaning

a chemical process by which substances like sugar are converted into alcohol or acids using microorganisms

Example

The fermentation of grapes produces wine.

ぶどうの発酵はワインを生産します。

C2 adjective /fəˈsiːʃəs/

facetious

皮肉な

Meaning

Treating serious issues with deliberately inappropriate humor

Example

He was being facetious when he said he wanted to live on the moon.

彼は月に住みたいと言ったとき、皮肉を言っていた。

C1 noun /ˈfɔːreɪ/

foray

突撃 / 初めての試み

Meaning

A sudden short attack or attempt, especially into new activity or territory.

Example

The company made its first foray into the international market.

その会社は国際市場への初めての進出を果たした。

C1 noun /ˈfjuː.də.lɪ.zəm/

feudalism

封建制度

Meaning

the social system in medieval Europe in which people worked and fought for nobles who gave them protection and land in return

Example

Feudalism shaped the political structure of medieval Europe.

封建制度は中世ヨーロッパの政治構造を形作った。

C1 noun /fæd/

fad

一時的な流行、トレンド

Meaning

a temporary fashion or trend; a short-lived craze

Example

The new diet became a popular fad among teenagers.

新しいダイエットはティーンエイジャーの間で人気の一時的なトレンドとなった。

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。

C1 verb /fɔːˈbɛər/

forbear

控える

Meaning

To refrain from doing something; to show patience or self-control.

Example

She forbore from commenting on his mistake.

彼女は彼の間違いについてコメントするのを控えました。

C2 adjective /ˈflɪpənt/

flippant

軽薄な

Meaning

not showing a serious or respectful attitude

Example

His flippant remarks annoyed the teacher.

彼の軽薄な発言は教師をイライラさせた。

B2 adverb /ˈfɔːrmərli/

Formerly

以前は; 以前

Meaning

in the past; previously; at an earlier time

Example

The building was formerly a school but is now a community center.

その建物は以前は学校でしたが、今はコミュニティセンターです。

B1 noun /ˈfeɪvər/

favor

お願い

Meaning

An act of kindness or approval.

Example

She asked him for a small favor.

彼女は彼に小さなお願いをした。

C1 adjective /ˈflaʊəri/

flowery

花のような / 飾られた

Meaning

Full of flowers or overly elaborate in style or language.

Example

She wrote a flowery letter filled with poetic phrases.

彼女は詩的なフレーズで満たされた花のような手紙を書いた。

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。

B1 noun /ˈfɔːr.tʃən/

Fortune

運; 幸運; 財産

Meaning

chance or luck as an external, arbitrary force affecting human affairs; a large amount of money or assets

Example

He made his fortune by investing wisely in technology companies.

彼はテクノロジー企業に賢明に投資することで運を得ました。

C2 adjective /ˈfædɪʃ/

faddish

一時的な流行

Meaning

Following a temporary trend or fashion

Example

Wearing neon clothes was a faddish style in the 1980s.

ネオンの服を着ることは1980年代の流行だった。

Meaning

To grow or develop in a healthy or successful way.

Example

Her business began to flourish after she introduced online sales.

B1 adjective /fɪkst/

fixed

固定された, 安定した

Meaning

firmly in place; not changing or movable

Example

The schedule for the meeting is fixed for Monday morning.

会議のスケジュールは月曜日の朝に固定されています。

C1 noun /ˈfreɪlti/

frailty

脆弱

Meaning

The condition of being weak, delicate, or easily broken.

Example

Old age often comes with physical frailty.

老化はしばしば身体的な脆弱さと共に訪れます。

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。

C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

冷水浴場

Meaning

a large cold pool in ancient Roman baths used for cooling off after hot baths

Example

The ruins of the Roman frigidarium are still visible today.

ローマのフリジダリウムの遺跡は今日でも見ることができます。

C1 verb /ˈflʌtər/

flutter

羽ばたく / 震える

Meaning

to move or flap quickly and lightly; to beat or wave with small rapid motions

Example

The butterfly began to flutter its wings in the sunlight.

蝶が日光の中で羽ばたき始めた。

C1 noun /ˈfiːtəs/

fetus

胎児

Meaning

an unborn or unhatched offspring in the womb or egg

Example

The doctor explained the development of the fetus during pregnancy.

医師は妊娠中の胎児の発達について説明しました。

C1 adjective /ˈfɜːr.vənt/

fervent

情熱的な、熱心な

Meaning

having or showing intense passion or enthusiasm

Example

She gave a fervent speech about climate change.

彼女は気候変動について情熱的なスピーチを行った。

A2 noun /ˈfaɪəˌwɜːk/

firework

花火

Meaning

a device that explodes or creates a display of lights and sounds, often used in celebrations

Example

The fireworks lit up the sky during the New Year's Eve celebration.

花火は新年の前夜祭で空を照らしました。

C2 adjective /ˈfrɪski/

Frisky

活発な; エネルギッシュな; 遊び好きな; いたずら好きな

Meaning

lively; energetic; playful; mischievous

Example

The frisky puppy ran around the garden playfully.

その元気な子犬は庭で遊びながら走り回っていました。

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。

B2 verb /fraʊn/

frown

眉をひそめる

Meaning

to wrinkle one's brow in displeasure or concentration

Example

She frowned when she heard the bad news.

彼女は悪いニュースを聞いて、眉をひそめた。

B2 noun ˈfreɪm.wɜːk

framework

枠組み

Meaning

An essential supporting structure of a building, vehicle, or object; a basic structure underlying a system, concept, or text.

Example

A strong framework is vital for governance.

強力な枠組みはガバナンスにとって重要です。

C1 noun /ˈfoʊliɪdʒ/

foliage

葉

Meaning

The leaves of a plant, collectively.

Example

The autumn foliage looked stunning in the park.

秋の葉は公園で素晴らしく見えました。

B2 adjective /fəˈbɪd.ən/

Forbidden

禁止された; 違法な

Meaning

not allowed; prohibited; banned

Example

Smoking is strictly forbidden in this building.

この建物では喫煙が厳しく禁止されています。

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。

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/verb /freɪ/

fray

争い, すり減る

Meaning

As a noun, a fight or heated dispute; as a verb, to unravel or wear out through friction.

Example

He tried to stay calm, but his nerves began to fray during the argument.

彼は冷静を保とうとしたが、議論の中で彼の神経はすり減り始めた。

A2 noun /flaʊər/

Flour

小麦粉

Meaning

fine powder made by grinding wheat or other grains; used for making bread, cakes, and pastry

Example

She mixed flour with water to make dough for bread.

彼女はパンの生地を作るために、小麦粉と水を混ぜました。

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。

C2 verb /flɪt/

flit

ひらひら舞う

Meaning

to move quickly and lightly from one place to another

Example

Butterflies flitted from flower to flower.

蝶が花から花へひらひらと舞った。

A2 adjective /ˈfaɪ.nəl/

Final

最終的な; 決定的な; 最後の

Meaning

last; concluding; decisive; ultimate

Example

This is the final exam of the semester.

これは学期の最終試験です。

C2 verb /ˈfrʌktɪˌfaɪ/

fructify

実らせる

Meaning

To make fruitful or productive; to bear fruit.

Example

The new policies will help fructify the economic potential of the region.

新しい政策は地域の経済的な潜在能力を実らせるのに役立ちます。

C2 adjective /ˈfʌndʒəbl/

fungible

代替可能な

Meaning

interchangeable; able to replace or be replaced by another identical item

Example

In finance, money is considered a fungible asset.

金融業界では、貨幣は代替可能な資産と見なされています。

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。

C1 noun, verb /ˈfɜːrloʊ/

furlough

一時休職

Meaning

temporary leave of absence from work, especially that granted to an employee or soldier

Example

Many workers were placed on furlough during the crisis.

多くの労働者は危機の間に休職させられました。

C1 noun /ˈfɔːrˌbɛər/

forebear

先祖

Meaning

An ancestor, especially one who lived a long time ago.

Example

He often speaks of his forebears with great respect.

彼はしばしば自分の先祖について尊敬を込めて話します。

B2 noun /ˈfɜː.tɪ.laɪ.zər/

fertilizer

肥料

Meaning

a substance added to soil to make plants grow more successfully

Example

Farmers use fertilizer to increase crop production.

農家は作物の生産量を増やすために肥料を使用します。

C2 adjective /fəˈloʊniəs/

felonious

重大な犯罪に関連する

Meaning

relating to or involved in serious criminal activity

Example

He was charged with felonious assault after the incident.

事件の後、彼は重罪暴行で起訴されました。

ひっくり返す

Meaning

to turn over quickly or suddenly; to toss lightly

Example

She flipped the pancake in the pan.

彼女はパンケーキをフライパンでひっくり返した。