foyer
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C1 noun /ˈfɔɪeɪr/

foyer

ロビー
Meaning
An entrance hall or lobby in a building.
Example
The guests waited in the hotel foyer before checking in.
ゲストはチェックインする前にホテルのロビーで待っていました。
B2 verb /feɪd/

fade

色あせる
Meaning
To gradually lose brightness, color, or strength.
Example
The colors of the old photo have started to fade.
古い写真の色が薄れてきた。
B1 noun /ˈfɔːr.mæt/

Format

フォーマット
Meaning
the way in which something is arranged or set out; the shape, size, and presentation of a book or document
Example
Please submit your report in PDF format by the end of the week.
週末までにPDFフォーマットで報告書を提出してください。
C2 adjective /ˈfætʃuəs/

fatuous

愚か
Meaning
silly or foolish, especially in a self-satisfied way
Example
His fatuous comments during the meeting annoyed everyone.
会議中に彼の愚かなコメントは皆を苛立たせました。
B2 noun /ˈfriːdəm ˌfaɪtər/

freedom fighter

自由の戦士
Meaning
a person who takes part in an armed or political struggle to achieve freedom or independence for their people or country
Example
The freedom fighter dedicated his life to the liberation of his homeland.
その自由の戦士は祖国の解放のために人生を捧げた。
B2 noun /ˈfeɪbəl/

fable

寓話
Meaning
a short story, typically featuring animals as characters, that conveys a moral lesson
Example
Aesop’s fables are famous for teaching valuable lessons through simple stories.
イソップの寓話は、簡単な物語を通して貴重な教訓を教えることで有名です。
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。
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。
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。
B2 adjective /ˈfɔːrtʃənət/

fortunate

幸運な
Meaning
Having good luck or receiving something desirable by chance.
Example
She was fortunate to escape the accident without injuries.
彼女は事故で怪我をすることなく逃げることができて幸運だった。
B2 noun /ˈfaɪ.bər/

fibre

繊維
Meaning
A thread or filament from which a vegetable tissue, mineral substance, or textile is formed; dietary material that aids digestion.
Example
Eating foods rich in fibre can improve your digestion.
食物繊維が豊富な食べ物を食べると消化が良くなります。
B2 noun /faɪˈnæn.ʃəl rɪˌspɒn.sɪˈbɪl.ə.ti/

financial responsibility

財務責任
Meaning
The practice of managing money and other financial resources in a responsible and effective manner.
Example
Financial responsibility ensures long-term economic stability.
財務責任は長期的な経済の安定を確保します。
C2 noun /ˈfjʊr.ʌŋ.kəl/

Furuncle

ふるんくる; こぶ;
Meaning
a painful pus-filled bump under the skin caused by infected, inflamed hair follicles
Example
The doctor prescribed antibiotics to treat the painful furuncle on his neck.
医者は彼の首の痛みを伴うフルンクルを治療するために抗生物質を処方しました。
C1 noun/verb /ˈfʌrəʊ/

furrow

Meaning
A long narrow trench made in the ground by a plow; to make wrinkles or grooves.
Example
The farmer plowed furrows in the field.
B2 adverb /ˈfɜ:rmli/

Firmly

しっかりと
Meaning
in a strong, steady, and unwavering manner
Example
She firmly believed in her decision.
彼女は自分の決定に固く信じていた。
C1 verb /fɔːrˈɡoʊ/

forgo

控える
Meaning
to decide not to do or have something
Example
She decided to forgo dessert to maintain her diet.
彼女はダイエットを維持するためにデザートを控えることを決めました。
B2 verb, noun, adjective /flʌʃ/

flush

顔を赤くする / 水で洗浄する
Meaning
to become red in the face, usually from embarrassment, heat, or excitement; to clean something with a flow of water
Example
She flushed with embarrassment when she realized her mistake.
彼女は自分のミスに気づいたとき、恥ずかしさで顔が赤くなった。
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 noun /ˈfɪɡjərˌhɛd/

figurehead

名目上の指導者
Meaning
a nominal leader with no real power; a symbolic head
Example
The king was merely a figurehead with no real authority.
王は実際の権限を持たない象徴的な指導者に過ぎなかった。
B2 noun /ˈfæntəsi/

fantasy

ファンタジー
Meaning
a creation of the imagination, especially something improbable or impossible
Example
She has a vivid fantasy about traveling to space.
彼女は宇宙旅行に関する生き生きとしたファンタジーを持っています。
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。
C1 verb /fɔːrˈseɪk/

forsake

Meaning
to abandon or give up something or someone
Example
He decided not to forsake his old friends despite his success.
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 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。
B1 adverb /ˈfʊli/

fully

完全に
Meaning
completely or entirely; to the fullest extent
Example
She is fully aware of the risks.
彼女はリスクについて完全に認識しています。
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。
B2 verb /fɔːrˈsiː/

foresee

予見する
Meaning
To be aware of beforehand; to predict or expect.
Example
She could foresee the challenges ahead.
彼女は前方の課題を予見することができました。
A2 adverb /ˈfaɪ.nəl.i/

Finally

ついに
Meaning
at last; after a long time; in the end; as the last point
Example
After years of hard work, she finally achieved her goal.
長年の努力の後、彼女はついに目標を達成しました。
C2 verb /frɪz/

frizz

Meaning
to form into small, tight curls or cause hair to become fuzzy and tangled
Example
The humid weather caused her hair to frizz.
B2 noun ˈfeɪs tə ˈfeɪs ˈbætl

face-to-face battle

面と面の戦い
Meaning
A direct confrontation or fight between opposing forces.
Example
The warriors fought a face-to-face battle with the enemies.
戦士たちは敵と面と面で戦った。
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。
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。
C1 noun/verb /fliːs/

fleece

Meaning
The woolly covering of a sheep; as a verb, to swindle or cheat someone.
Example
The farmer sheared the sheep’s fleece carefully.
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。
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。
A2 adjective /fer/

Fair

公正な; 妥当な; 魅力的な
Meaning
just and reasonable; treating people equally; light in color; attractive
Example
The judge made a fair decision in the case.
裁判官はその事件で公正な判断を下しました。
C1 noun /fiːt/

feat

偉業
Meaning
an achievement that requires great courage, skill, or strength
Example
Climbing Mount Everest was a remarkable feat.
エベレスト山の登頂は素晴らしい偉業でした。
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。
C2 verb /feɪz/

faze

動揺させる
Meaning
to disturb or disconcert someone; to cause to feel unsettled
Example
She was not fazed by the unexpected question.
予期しない質問で動じなかった。
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。
B1 noun fəˈsɪl.ɪ.tiz

facilities

施設
Meaning
A place, amenity, or piece of equipment provided for a particular purpose.
Example
Facilities improve industrial productivity.
施設は産業の生産性を向上させます。
B1 noun ˈfæmɪli triː

Family Tree

家系図
Meaning
A diagram showing the relationships between people in several generations of a family.
Example
Creating a family tree helps understand family history.
家系図を作成することは、家族の歴史を理解するのに役立ちます。
B1 noun /ˈfɪnɪʃ laɪn/

finish line

ゴールライン
Meaning
The line or point at the end of a race or competition where participants complete it.
Example
She sprinted towards the finish line and won the race.
彼女はフィニッシュラインに向かって全力で走り、レースに勝った。
B1 noun /feɪθ/

Faith

信念; 信頼; 宗教的信仰;
Meaning
complete trust or confidence in someone or something; strong belief in religion
Example
She had unwavering faith in her team's ability to succeed.
彼女はチームの成功能力に揺るぎない信念を持っていました。
B1 noun /ˈfɪkʃən/

fiction

フィクション
Meaning
Literature created from the imagination, not presented as fact.
Example
She enjoys reading science fiction novels.
彼女はサイエンスフィクション小説を読むのが好きです。
B2 adjective /flɔːd/

flawed

欠陥のある
Meaning
having a mistake or fault that reduces its value or quality
Example
The flawed design of the car led to a recall.
車の欠陥のあるデザインがリコールを引き起こした。
C1 adjective /ˈfɑːð.ər.ləs/

fatherless

父親がいない
Meaning
without a father
Example
The fatherless child relied on the support of his community.
その父親がいない子供は、コミュニティの支援に頼っていました。
A2 noun /fɒks/

Fox

キツネ
Meaning
a wild animal related to dogs, with a pointed face and thick fur
Example
The red fox is known for its cunning nature.
赤いキツネはそのずる賢い性格で知られています。
C2 verb /fleɪ/

flay

皮を剥ぐ/厳しく批判する
Meaning
to strip off the skin of something or criticize severely
Example
The chef flayed the fish before cooking it.
シェフは魚を料理する前に皮を剥ぎました。
C2 adjective /ˈfluːviəl/

fluvial

河川に関連する
Meaning
relating to or found in a river
Example
The fluvial deposits indicated the presence of an ancient river system.
河川堆積物は古代の川のシステムの存在を示していた。
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。
C2 noun /ˈfrɛʃɪt/

freshet

突然の川の氾濫
Meaning
A sudden overflow of a stream or river caused by heavy rain or melting snow.
Example
After the storm, the river turned into a raging freshet.
嵐の後、川は激しいフレシェットに変わった。
B1 noun /ˈfæn.si/

Fancy

興味; 想像やファンタジー
Meaning
a feeling of liking or wanting something; imagination or fantasy
Example
The child had a fancy for becoming a famous astronaut when he grew up.
その子供は大きくなったら有名な宇宙飛行士になることを夢見ていました。
B2 noun /ˈfrɛʃnəs/

freshness

新鮮さ
Meaning
The quality of being new, clean, and full of energy.
Example
The freshness of the morning air made everyone feel alive.
朝の新鮮な空気で、みんなが生き生きと感じました。
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。
B2 adjective /ˈfɜːr.taɪl/

Fertile

肥沃な
Meaning
capable of producing abundant vegetation or crops; able to conceive children
Example
The fertile soil in this region makes it perfect for growing vegetables.
この地域の肥沃な土壌は、野菜を育てるのに最適です。
B2 verb ˈfɔːr.mjə.leɪt

formulate

策定する
Meaning
To create or develop a plan or idea clearly and specifically, to construct an idea or strategy clearly.
Example
The company must formulate a strategy for expansion.
会社は拡張戦略を策定する必要があります。
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。
B2 adjective /ˌfʌndəˈmɛntl/

fundamental

Meaning
forming a necessary base or core; of central importance
Example
Honesty is a fundamental principle of good leadership.
C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

フォールトトレランス
Meaning
The ability of a system to continue operating properly in the event of the failure of some of its components.
Example
Fault-tolerance ensures dependable systems.
フォールトトレランスは信頼性のあるシステムを保証します。
A1 noun /fʊt/

Foot

足
Meaning
the lower extremity of the leg that is in direct contact with the ground in standing or walking
Example
She hurt her foot while running.
彼女は走っている間に足を怪我しました。
B1 noun /foʊk/

folk

人々
Meaning
people in general, often referring to a group or community
Example
Country folk often live a simple life.
田舎の人々はよくシンプルな生活をしています。
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。
A1 number /ˈfɔːrti/

forty

幸せ
Meaning
the number 40; ten times four
Example
She celebrated her forty years of life with a big party.
彼女は賞を受け取ったとき、幸せを隠せなかった。
C1 noun /ˈfɛləni/

felony

重罪
Meaning
a serious crime, usually punishable by imprisonment for more than one year
Example
He was convicted of a felony and sentenced to ten years in prison.
彼は重罪で有罪判決を受け、10年間の懲役刑を言い渡されました。
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。
A1 verb /ˈfɒloʊ/

follow

従う
Meaning
to move behind someone or something; to go after or come after
Example
The children followed their teacher into the classroom.
子供たちは先生について教室に入りました。
C1 noun ˈfɜːr.vɚ

fervor

情熱または熱意
Meaning
Strong passion or enthusiasm for something.
Example
He spoke with great fervor about his vision for the company.
彼は会社のビジョンについて熱心に話しました。
B1 noun /ˈfeɪ.ljər/

Failure

失敗
Meaning
lack of success; an unsuccessful person, enterprise, or thing
Example
The project's failure was due to poor planning and communication.
プロジェクトの失敗は、計画とコミュニケーションの不備によるものでした。
C1 noun /ˈfæk.ʃən/

Faction

派閥
Meaning
a small organized dissenting group within a larger one
Example
Different factions within the party disagreed about the new policy.
党内の異なる派閥は新しい政策に対して意見が一致しませんでした。
C1 noun /ˈfɛlən/

felon

犯罪者
Meaning
a person who has committed a serious crime
Example
The felon was sentenced to ten years in prison.
犯罪者は10年の刑を言い渡された。
A2 verb /faʊnd/

found

設立する
Meaning
to establish or create something; to discover
Example
They founded the company in 1995.
彼らは1995年に会社を設立しました。
B2 noun /ˈfɪlmˌmeɪkər/

filmmaker

映画製作者
Meaning
a person who makes films, typically as a profession
Example
He is a well-known filmmaker in the industry.
彼は業界で有名なフィルムメーカーです。
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

もろさ
Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
角膜のもろさはこすることで増加します。
B2 noun /fɛər/

fare

運賃
Meaning
the money paid for a journey on public transport; also food or treatment provided
Example
The bus fare to the city center is five dollars.
市内中心部までのバス運賃は5ドルです。
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 /ˈfeɪ.tə.lɪ.zəm/

fatalism

運命論
Meaning
the belief that all events are predetermined and inevitable
Example
He embraced fatalism, believing that nothing he did could change his destiny.
彼は運命論を受け入れ、自分の行動が運命を変えることはできないと信じていました。
C2 adjective /ˈflɒrɪd/

florid

過度に装飾された / 赤みがかった
Meaning
Having a red or flushed complexion; or excessively ornate and intricate.
Example
The speaker’s florid style made the lecture hard to follow.
講演者の過度に装飾されたスタイルは、講義を理解するのを難しくした。
B2 noun /frɒk/

Frock

ワンピース
Meaning
a dress, especially a simple or casual one for women or children
Example
The little girl wore a pink frock to her birthday party.
小さな女の子は誕生日パーティーにピンクのワンピースを着て行きました。
B2 noun /faʊl/

Fowl

家禽
Meaning
a domesticated bird kept for meat or eggs; chicken or other poultry
Example
The farmer raised fowl in his backyard for fresh eggs and meat.
農場主は新鮮な卵と肉のために庭で家禽を育てていました。
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 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 adverb /ˈfɪksɪdli/

Fixedly

固定的に
Meaning
in a steady, unmoving manner; with intense concentration
Example
He stared fixedly at the painting.
彼は絵を固定的に見つめていた。
B2 noun ˈfrʌn.tɪərz

frontiers

最前線
Meaning
The extreme limit of settled land beyond which lies wilderness; the limits of knowledge or achievement in a particular field.
Example
The project pushes the frontiers of space exploration.
このプロジェクトは宇宙探査の最前線を押し広げています。
B2 adverb /ˈfɔ:rmoast/

Foremost

最も重要なこと; 何よりもまず
Meaning
most importantly; above all; in the first place
Example
First and foremost, we need to ensure safety.
まず第一に、安全を確保する必要があります。
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。
B2 noun /ˈfjʊr.i/

Fury

激しい怒りや暴力的な感情;
Meaning
wild or violent anger; extreme intensity of emotion or activity
Example
His fury was evident when he discovered someone had stolen his bicycle.
彼の怒りは彼が自転車を盗まれたことに気づいたときに明らかだった。
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 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。
B2 verb /ˈfæs.ɪ.neɪt/

fascinate

魅了する
Meaning
to attract and hold the attention of someone; to charm or captivate
Example
The magician's performance fascinated the audience.
マジシャンのパフォーマンスは観客を魅了した。
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。
C2 adverb /ˌfɔːrθˈwɪθ/

Forthwith

ただちに; 遅れなく; すぐに
Meaning
immediately; without delay; at once
Example
The manager ordered the employee to stop the unsafe practice forthwith.
マネージャーは従業員に危険な行為をただちにやめるように命じました。
B2 adjective /fəˈɡɪv.ɪŋ/

Forgiving

許す
Meaning
ready and willing to forgive; merciful; lenient
Example
She has a forgiving nature and rarely holds grudges.
彼女は許す性格を持っており、ほとんど恨みを抱きません。
C1 verb /flɑp/

flop

失敗
Meaning
to fall or move heavily and clumsily; to fail completely
Example
The new movie flopped at the box office.
新しい映画は興行成績が振るわなかった。
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。
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。
C2 noun /ˈfɔːltˌfaɪndər/

faultfinder

欠点探し人
Meaning
a person who habitually finds fault with others
Example
He is such a faultfinder that nothing anyone does is ever good enough.
彼は欠点探し人で、誰かが何かをしても決して十分ではありません。
C2 adjective /fluːˈɛnʃəl/

fluential

影響力のある
Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
影響力のある話者は、観客全体を魅了しました。
C1 adjective /ˈfjuː.dəl/

feudal

封建的
Meaning
relating to the system of feudalism, a medieval social system based on land ownership and obligations
Example
The castle is a remnant of the feudal era.
城は封建時代の遺物です。
B2 verb /ˈfrʌsˌtreɪt/

frustrate

フラストレートする
Meaning
to prevent from accomplishing; to make someone feel annoyed
Example
The traffic jam frustrated all the commuters.
渋滞はすべての通勤者をフラストレートさせました。
C2 adjective fəˈleɪ.ʃəs

fallacious

虚偽の
Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
彼の主張は虚偽の理由に基づいていた。
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。
A2 verb /faɪt/

fight

戦う
Meaning
to engage in battle or combat; to struggle against
Example
The soldiers fight for their country.
兵士たちは自国のために戦っています。
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 /fɔːrˈboʊd/

forebode

予兆する
Meaning
To predict or have a strong inner feeling of a future misfortune or evil.
Example
Dark clouds forebode a coming storm.
暗い雲が来る嵐を予兆している。
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。
C2 adjective /ˈfæl.oʊ/

fallow

休耕地
Meaning
Describing land that is left unplanted for a period to restore its fertility, allowing soil to recover nutrients and break pest and disease cycles.
Example
Farmers leave their fields fallow to restore soil fertility.
農家は土壌の肥沃度を回復させるために畑を休ませます。
C2 noun /ˈflɪpənsi/

flippancy

軽薄
Meaning
lack of seriousness; showing a disrespectful or trivial attitude
Example
His flippancy during the meeting offended his colleagues.
会議中の彼の軽薄さは、同僚を不快にさせた。
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。
C2 noun /ˈflɛkʃən/

flection

屈曲
Meaning
The act of bending or the state of being bent, especially of a limb or joint.
Example
The doctor tested the patient's knee flection during the examination.
医者は検査中に患者の膝の屈曲をテストしました。
B2 adjective /fɔːrˈsiːəbl/

foreseeable

予測可能な
Meaning
Able to be predicted or expected in advance
Example
The company is unlikely to make changes in the foreseeable future.
その会社は予測可能な未来において変化を起こす可能性は低い。
C1 adjective /ˈfrɪdʒɪd/

Frigid

凍てつく; 寒い
Meaning
extremely cold; freezing; icy
Example
The frigid weather made it difficult to go outside.
冷たい天気で外に出るのが難しかった。
A1 noun /ˈflaʊər/

flower

花
Meaning
the seed-bearing part of a plant, often colorful and fragrant, that blossoms
Example
The garden was full of colorful flowers.
庭はカラフルな花でいっぱいでした。
B1 adjective /ˈfɔːrmər/

former

元
Meaning
Having been previously in a particular role or position.
Example
He is a former president of the association.
彼はその協会の元会長です。
A2 noun /faɪl/

File

やすり
Meaning
a tool with a rough surface for smoothing or shaping hard materials; a collection of papers or data
Example
He used a metal file to smooth the rough edges.
彼は金属製のヤスリを使って荒い端を滑らかにしました。
B2 noun /ˈfɛmənɪst/

feminist

フェミニスト
Meaning
a person who supports equal rights and opportunities for women and men
Example
She proudly calls herself a feminist and fights for gender equality.
彼女は誇りを持って自分をフェミニストだと言い、ジェンダー平等のために戦っています。
B2 noun ˈflæʃkɑːrdz

flashcards

フラッシュカード
Meaning
Cards containing small amounts of information, held up for students to see, as an aid to learning.
Example
Flashcards help in quick memorization.
フラッシュカードは迅速な記憶に役立ちます。
C2 verb /fɔːrˈdʒʌdʒ/

forejudge

前もって判断する
Meaning
To judge beforehand without adequate information.
Example
It is unfair to forejudge someone without knowing the facts.
事実を知らずに誰かを前もって判断するのは不公平です。
C2 noun /fɪntʃ/

finch

フィンチ（小さな歌う鳥）
Meaning
a small songbird with a short, stout bill
Example
A colorful finch perched on the branch singing sweetly.
カラフルなフィンチが枝に止まり、甘い歌を歌っていました。
A1 noun /fuːd/

food

食べ物
Meaning
any nutritious substance that people or animals eat or drink to maintain life and growth
Example
Rice is a common food in Asia.
ご飯はアジアでは一般的な食べ物です。
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。