floe
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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。
B1 noun /ˈfaɪər.mən/

Fireman

消防士
Meaning
a person whose job is to extinguish fires and rescue people
Example
The brave fireman rescued the family from the burning building.
勇敢な消防士は燃えている建物から家族を救いました。
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。
B2 noun /fɪɡ/

Fig

いちじく
Meaning
a soft sweet fruit that is purple or green on the outside and has many small seeds
Example
The fig tree in our backyard produces delicious fruits every summer.
私たちの庭のいちじくの木は毎年夏に美味しい果物を生産します。
C2 noun /ˈflæt.ər.ər/

Flatterer

お世辞を言う人
Meaning
a person who lavishes praise, often insincerely and in order to gain advantage
Example
The king was surrounded by flatterers who only told him what he wanted to hear.
王様はお世辞を言う人たちに囲まれて、彼が聞きたいことだけを言ってもらった。
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。
A1 noun /fruːt/

fruit

果物
Meaning
The sweet and fleshy product of a plant that contains seeds.
Example
Mango is my favorite fruit.
マンゴーは私のお気に入りのフルーツです。
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 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。
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。
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。
C1 noun ˈflɔː.rə ænd ˈfɔː.nə

flora and fauna

フローラとファウナ
Meaning
The plants and animals of a particular region, habitat, or geological period.
Example
The Galápagos Islands have unique flora and fauna.
ガラパゴス諸島には独特のフローラとファウナがあります。
C1 adjective /ˈfiːbl/

feeble

弱い, 無力
Meaning
lacking physical strength or vigor; weak
Example
After the illness, she felt too feeble to stand.
病気の後、彼女は立ち上がるにはあまりにも弱かった。
C2 noun /fluː/

flue

煙道
Meaning
A pipe or channel for smoke and waste gases produced by a fire, gas heater, or power station.
Example
The chimney flue needs to be cleaned regularly.
煙突の煙道は定期的に掃除する必要があります。
C2 noun /friːz/

frieze

フリーズ
Meaning
a decorative horizontal band, often sculpted or painted, usually on a wall near the ceiling
Example
The frieze above the entrance depicts scenes from ancient mythology.
入口上のフリーズは古代神話のシーンを描いています。
B1 adjective /faɪˈnænʃəl/

financial

財務的
Meaning
relating to money, banking, or finance
Example
He made a sound financial decision by investing wisely.
彼は賢明に投資して、健全な財務的決定を下しました。
B2 noun /ˈfeɪ.lɪŋ/

Failing

失敗; 欠点; 弱点
Meaning
a weakness, especially in a person's character; a fault
Example
His only failing is that he talks too much during meetings.
彼の唯一の失敗は、会議中に話しすぎることです。
C1 noun /ˈfɔːrdʒər/

forger

偽造者
Meaning
a person who makes fake documents, artworks, or signatures
Example
The police arrested a forger who had been selling counterfeit paintings.
警察は偽造者を逮捕しました。彼は偽の絵画を販売していました。
C1 noun fluˈɪd.ɪ.ti

fluidity

流動性
Meaning
The ability of a substance to flow easily; smooth and graceful movement or style.
Example
The fluidity of the dancer's movements was mesmerizing.
ダンサーの動きの流動性は魅惑的でした。
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。
C2 noun /ˈfɒpəri/

foppery

虚飾
Meaning
Foolish or excessive concern with one's appearance or manners; pretentious behavior.
Example
His obsession with fashion was dismissed as mere foppery.
彼のファッションへの執着は単なる虚飾と見なされた。
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。
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。
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。
C1 noun /ˈfɪʃ.ər/

fissure

ひび割れ
Meaning
a long, narrow opening or crack in a surface or object
Example
The earthquake caused a deep fissure in the road.
地震によって道路に深いひび割れができました。
C2 verb /ˈfɛtər/

fetter

束縛する、制限する
Meaning
to restrain or restrict someone’s freedom
Example
The strict rules fettered the creativity of the students.
厳しいルールは学生の創造性を制限した。
C1 adverb /ˈfɜː.vənt.li/

Fervently

熱心に; 熱烈に;
Meaning
with passionate intensity; ardently; with great emotion or enthusiasm
Example
She fervently hoped that her dreams would come true.
彼女は自分の夢が実現することを熱心に願っていました。
C2 noun /ˈfɔːrkɔːrt/

forecourt

前庭
Meaning
an open area in front of a large building, especially a petrol station or hotel
Example
The car was parked in the hotel forecourt.
車はホテルの前庭に駐車されていました。
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。
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。
C1 adjective /ˈfɜːrtɪv/

furtive

ひそかな
Meaning
Attempting to avoid notice or attention, typically because of guilt or a belief that discovery would lead to trouble.
Example
He cast a furtive glance at the door before leaving.
彼は出発前にひそかにドアを見た。
B2 adjective /ˈfɛmənɪn/

feminine

女性的
Meaning
having qualities traditionally associated with women; feminine in nature
Example
She has a very feminine style of dressing.
彼女はとても女性的な服装スタイルを持っています。
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。
C1 noun /ˈfɔːr.teɪ/ or /fɔːrt/

forte

得意
Meaning
a strong ability or talent; something one does particularly well
Example
Cooking is definitely her forte.
料理は間違いなく彼女の得意分野です。
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。
B2 noun ˌfʌŋk.ʃəˈnæl.ə.ti

functionality

機能性
Meaning
The quality of being functional; the ability to work or operate as intended.
Example
The new refrigerator has improved functionality.
新しい冷蔵庫は機能性が向上しました。
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 /ˈfer.i boʊt/

Ferry-boat

フェリー
Meaning
a boat that carries passengers and vehicles across water
Example
We took the ferry-boat to cross the river.
私たちは川を渡るためにフェリー・ボートに乗りました。
A2 noun /fɪlm ˈæktər/

film actor

映画俳優
Meaning
A person who performs roles in movies or films.
Example
The film actor received widespread acclaim for his performance.
その映画俳優は演技で広く称賛されました。
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 noun /ˈfrɛs.koʊ/

fresco

フレスコ画
Meaning
A painting done rapidly in watercolor on wet plaster so that the colors penetrate the surface
Example
The church walls were decorated with beautiful frescoes.
教会の壁は美しいフレスコ画で飾られていました。
B2 noun /ˈfriːˌlænsər/

freelancer

フリーランサー
Meaning
A person who works independently without being permanently employed by one organization.
Example
She works as a freelancer designing websites for different clients.
彼女はフリーランサーとして、異なるクライアントのためにウェブサイトをデザインしています。
C1 noun ˈfɔː.saɪt

foresight

先見の明
Meaning
The ability to predict or the action of predicting what will happen or be needed in the future.
Example
His foresight helped the company avoid financial losses.
彼の先見の明は会社が財政的損失を避けるのに役立った。
A2 noun, verb /fuːl/

fool

バカ
Meaning
a silly or stupid person; to trick someone
Example
He felt like a fool after believing the prank.
いたずらを信じた後、彼は自分がバカだと思った。
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。
C1 adjective /frəˈtɜːrnəl/

fraternal

Meaning
Relating to brothers or brotherhood; friendly and supportive.
Example
The two nations maintain a fraternal relationship.
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 /ˌfʌndəˈmɛntəli/

fundamentally

基本的に
Meaning
in a basic and important way; at the core
Example
The two theories are fundamentally different.
この二つの理論は基本的に異なります。
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。
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。
C1 verb /ˈfɔːlsɪfaɪ/

falsify

偽造する
Meaning
to make something false or to misrepresent
Example
He tried to falsify the documents to avoid taxes.
彼は税金を避けるために書類を偽造しようとした。
C2 adjective /ˈfrɒlɪksəm/

Frolicsome

遊び好きな; 陽気な; 元気な
Meaning
joyful; playful; merry; cheerful
Example
The frolicsome children laughed and played in the park.
遊び好きな子供たちは公園で笑い、遊んでいました。
B1 noun /ˈfes.tə.vəl/

Festival

フェスティバル; 祭り;
Meaning
a day or period of celebration, typically for religious reasons; an organized series of concerts, films, etc.
Example
The music festival attracted thousands of visitors from around the world.
音楽フェスティバルは世界中から何千人もの観客を魅了しました。
C1 verb, noun /ˈflʌstər/

fluster

困惑させる
Meaning
to make someone agitated or confused
Example
The unexpected question flustered him.
予期しない質問が彼を困惑させた。
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。
C1 adjective /ˈfiːzəbl/

feasible

実行可能
Meaning
possible to do easily or conveniently; practical and workable
Example
It is feasible to complete the project within two months.
このプロジェクトを2ヶ月以内に完了することは実行可能です。
A1 noun ˈfjuː.tʃər

future

未来
Meaning
The time or a period of time following the moment of speaking or writing; time regarded as still to come.
Example
Future projects depend on strategic planning.
未来のプロジェクトは戦略的な計画に依存しています。
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。
C2 noun /flɔːˈrɛsəns/

florescence

花の開花期
Meaning
The process, state, or period of flowering.
Example
The garden reached its peak florescence in spring.
庭は春に最盛期の花の開花期に達しました。
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。
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。
C2 noun /ˈfoʊ.li.oʊ/

folio

大きな本や写本
Meaning
A sheet of paper folded once to form two leaves (four pages) of a book; also a term for a large book or manuscript.
Example
The library houses an ancient Shakespeare folio.
図書館には古いシェイクスピアのフォリオがあります。
C2 verb /ˈfʌdəl/

fuddle

混乱させる
Meaning
To confuse or stupefy, especially with alcohol or overwhelming information.
Example
The complicated instructions fuddled the new employees.
複雑な指示が新しい従業員を混乱させました。
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。
C2 noun /ˈfɜːrðərəns/

furtherance

促進
Meaning
The advancement or promotion of something.
Example
The new policy was introduced in furtherance of social justice.
新しい政策は社会的正義の促進のために導入されました。
B1 noun /feɪk/

Fake

偽物; 詐欺; 偽の物
Meaning
a thing that is not genuine; a forgery or sham
Example
The painting was discovered to be a fake worth very little money.
その絵画は偽物であると発見され、その価値は非常に低かった。
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。
C2 noun /fiːˈkʌndɪti/

fecundity

肥沃, 繁殖力
Meaning
the ability to produce an abundance of offspring or new growth; fertility
Example
The fecundity of the river delta supports diverse wildlife.
川の三角州の肥沃は多様な野生動物を支えています。
C2 verb /fɔrˈswɛr/

forswear

放棄する
Meaning
to renounce or reject; to give up completely
Example
He forswore his old habits and started a new life.
彼は古い習慣を捨て、新しい人生を始めました。
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。
B1 adjective /ˈfriːkwənt/

Frequent

頻繁
Meaning
happening often; occurring regularly; repeated
Example
He makes frequent visits to his grandmother.
彼は頻繁に祖母を訪れます。
C2 noun /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

予知
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
預言者はその出来事の予知をしていると主張した。
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。
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。
B1 adverb /ˈfeər.li/

Fairly

公正に; 適度に; 合理的に
Meaning
in a just manner; moderately; reasonably
Example
The test was fairly easy, but some questions were challenging.
テストはかなり簡単でしたが、いくつかの質問は挑戦的でした。
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。
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 noun /fəˈsɪl.ɪ.ti/

facility

施設
Meaning
A place, amenity, or piece of equipment provided for a particular purpose.
Example
The facility was well-maintained.
施設はよく管理されていました。
A2 noun /ˈfæʃ.ən/

fashion

ファッション
Meaning
a popular or accepted style of clothing, behavior, or way of doing something
Example
She always keeps up with the latest fashion.
彼女はいつも最新のファッションを追いかけています。
C1 noun ˌfɜːr.tɪ.laɪˈzeɪ.ʃən

fertilization

肥料施用
Meaning
The process of adding nutrients to soil to increase crop productivity.
Example
Organic fertilization enhances soil health.
有機肥料施用は土壌の健康を改善します。
A1 adjective/verb/adverb /friː/

free

自由
Meaning
Not under the control or in the power of another; able to act or be done as one wishes.
Example
The children are free to play outside.
子供たちは外で自由に遊べます。
C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

偶然の
Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
彼らの出会いは完全に偶然でした。
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。
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。
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。
B1 noun /ˈfʌŋkʃən/

function

機能
Meaning
An activity or purpose natural to or intended for a person or thing.
Example
The main function of the heart is to pump blood.
心臓の主な機能は血液をポンプすることです。
B2 noun /ˈfleɪ.vər/

Flavour

風味
Meaning
the distinctive taste of a food or drink; a particular quality or atmosphere
Example
The soup had a rich flavour of herbs and spices from the garden.
スープには庭からのハーブとスパイスの豊かな風味がありました。
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。
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。
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。
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。
C2 adjective /ˈfjuːzəbl/

fusible

融解可能な
Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
エンジニアは実験で融解可能な合金を使用しました。
C1 noun /fəˈnætɪsɪzəm/

fanaticism

熱狂
Meaning
the quality of being fanatical; extreme zeal or obsession
Example
Religious fanaticism can lead to intolerance and conflict.
宗教的な熱狂は不寛容と対立を引き起こす可能性があります。
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。
C2 adjective /ˈfɔːnɪŋ/

fawning

過度のほめ言葉
Meaning
displaying exaggerated flattery or affection
Example
Her fawning compliments made everyone uncomfortable.
彼女の過度のほめ言葉は、皆を不快にさせました。
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。
C1 noun /fɪˈnɛs/

finesse

巧妙さ, 技量, 洗練
Meaning
Subtlety and skill; refinement and delicacy in performance or artistry.
Example
The artist painted with great finesse.
そのアーティストは大きな巧妙さで絵を描いた。
C2 noun /ˈfʌriər/

furrier

毛皮商人
Meaning
A person who prepares or deals in furs.
Example
The furrier displayed fine coats in his shop.
毛皮商人は店に美しいコートを展示しました。
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。
C2 verb /ˌfɔːrˈrʌn/

forerun

先駆ける
Meaning
To go before; to precede in time, place, or action.
Example
Dark clouds often forerun a storm.
暗い雲はしばしば嵐の前触れとなる。
C2 noun /fiːf/

fief

封建制度の下で保有される土地; 支配領域または制御区域
Meaning
an estate of land held under the feudal system; a domain or area of control
Example
The knight was granted a fief by the lord for his service.
騎士はそのサービスに対して領主から封土を与えられました。
C2 verb /fɪˈneɪɡəl/

finagle

巧妙さや騙しで物を得る
Meaning
to obtain something by cleverness or trickery
Example
He finagled a free ticket by pretending to be a VIP guest.
彼はVIPゲストだと偽って無料チケットを手に入れた。
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 noun /ˌfæs.ɪˈneɪ.ʃən/

Fascination

魅力; 魅了; 魅力的な興味
Meaning
the power to fascinate someone; the state of being intensely interested
Example
Her fascination with ancient history led her to become an archaeologist.
彼女の古代史への魅力は、彼女を考古学者にさせました。
A2 adjective /ˈfɔːrən/ or /ˈfɑːrən/

foreign

外国の
Meaning
Belonging to or coming from another country.
Example
She loves studying foreign languages.
彼女は外国語を学ぶのが好きです。
A1 verb /fərˈɡet/

forget

忘れる
Meaning
to be unable to remember something; to fail to bring something to mind
Example
Don't forget to lock the door when you leave.
出かけるときはドアを閉め忘れないでください。
B2 adjective /ˌfɔːrθˈkʌmɪŋ/

forthcoming

近づいている
Meaning
about to happen soon; willing to share information
Example
The company announced its forthcoming product launch.
会社は近づいている製品の発売を発表しました。
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。
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 /frɔːt/

fraught

満ちた
Meaning
Filled with or likely to result in something undesirable.
Example
The negotiations were fraught with tension and uncertainty.
交渉は緊張と不確実性で満ちていました。
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。
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。
C2 noun /ˈfɔɪbəl/

foible

小さな弱点
Meaning
A minor weakness or eccentricity in someone's character.
Example
She loved him despite his little foibles.
彼女は彼の小さな弱点を気にせずに彼を愛していた。
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

未来学者
Meaning
A person who studies or predicts the future, especially trends in science, technology, or society.
Example
The futurist predicted major changes in transportation within the next decade.
未来学者は次の10年間で交通に大きな変化があると予測しました。
A2 adjective /fɪfθ/

fifth

第五
Meaning
constituting number five in a sequence
Example
She lives on the fifth floor of the building.
彼女はその建物の五階に住んでいます。
C2 verb /ˈfɛstər/

fester

悪化する、激化する
Meaning
to become worse or more intense, often through neglect or infection
Example
If grievances are ignored, they may fester into resentment.
不満を無視すると、それは恨みに変わることがあります。
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。
B2 adjective, noun /ˈfeɪʃəl/

facial

フェイシャル
Meaning
Relating to the face; a beauty treatment for the face
Example
She booked a facial at the spa.
彼女はスパでフェイシャルを予約しました。
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。
A1 noun /ˈfraɪ.deɪ/

friday

金曜日
Meaning
the day of the week following Thursday and preceding Saturday
Example
We have a team meeting every Friday afternoon.
私たちは毎週金曜日の午後にチーム会議があります。
C1 noun ˌfiː.zəˈbɪl.ə.ti

feasibility

実現可能性
Meaning
The state or degree of being easily or conveniently done; possibility.
Example
The company conducted a feasibility study before launching the project.
会社はプロジェクトを開始する前に実現可能性調査を行った。