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A1 noun /flɔːr/

floor

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。
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。
B2 verb fəˈsɪl.ɪ.teɪt

facilitate

容易にする
Meaning
Make an action or process easier or more achievable; to help bring about.
Example
Good infrastructure facilitates economic growth.
良いインフラは経済成長を容易にする。
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。
C1 noun /ˈfen.jʊ.griːk/

Fenugreek

フェヌグリーク
Meaning
an herb whose seeds and leaves are used as a spice in cooking
Example
Fenugreek seeds have a slightly bitter taste and are commonly used in Indian cuisine.
フェヌグリークの種は少し苦味があり、インディアン・カレーなどでよく使われます。
B2 adjective /ˈfræntɪk/

frantic

必死の
Meaning
Extremely anxious, hurried, or out of control due to fear or excitement.
Example
She made a frantic call to her family after the accident.
事故後、彼女は家族に必死の電話をかけた。
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 verb /flɪp/

flip

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。
C2 noun /ˈflɒtsəm/

flotsam

漂流物
Meaning
Floating debris from a shipwreck or things discarded and left floating.
Example
The beach was littered with flotsam after the storm.
嵐の後、ビーチは漂流物で埋め尽くされていた。
C2 noun /ˈfaɪər.brænd/

firebrand

活動家
Meaning
a person who is passionate about a cause, often inciting change or action
Example
The activist was a true firebrand, inspiring everyone around him to join the protest.
その活動家は本物の火のような情熱を持ち、周りの全員を抗議に参加させた。
C1 adjective /ˈfɪk.əl/

Fickle

気まぐれな; 不安定な; 変わりやすい;
Meaning
changeable; inconstant; liable to sudden unpredictable change
Example
His fickle nature made it hard to trust his promises.
彼の気まぐれな性格は、彼の約束を信じることを難しくした。
B2 adjective /ˈfɪr.fəl/

fearful

恐ろしい
Meaning
feeling afraid or showing fear
Example
She was fearful of walking alone at night.
彼女は夜に一人で歩くのを恐れていた。
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。
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 verb ˈflʌk.tʃu.eɪt

fluctuate

変動する
Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
株価は市場の状況によって変動します。
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.
C1 noun /faɪˈnælɪti/

finality

決定的な性質
Meaning
the quality of being final or irreversible; a sense of conclusiveness
Example
The judge's decision gave the case a sense of finality.
裁判官の決定はその事件に決定的な感覚を与えた。
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。
B2 noun /ˈfɒsɪl/

fossil

化石
Meaning
the remains or impression of a prehistoric plant or animal embedded in rock
Example
The fossil of a dinosaur was discovered in the mountains.
山で恐竜の化石が発見されました。
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。
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。
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。
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。
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。
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。
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。
B1 noun freɪm

Frame

額縁
Meaning
A rigid structure that surrounds something such as a picture, door, or windowpane.
Example
A framed family tree can be displayed in your home.
額縁に入れた家系図は家で展示できます。
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。
A2 noun /fæt/

Fat

脂肪
Meaning
a natural oily substance occurring in animal bodies; lipid used in cooking
Example
Too much fat in your diet can be unhealthy.
食生活における過剰な脂肪は健康に悪影響を及ぼす可能性があります。
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。
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。
C1 adjective ˈfjuː.taɪl

futile

無駄な
Meaning
Incapable of producing any useful result; pointless.
Example
His attempts to change the situation were futile.
状況を変えるための彼の試みは無駄だった。
B2 verb /fliː/

flee

逃げる
Meaning
To run away from danger or a threatening situation.
Example
The villagers had to flee during the flood.
村人たちは洪水の間に逃げなければなりませんでした。
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 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。
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。
A1 verb /fiːl/

Feel

感じる; 経験する; 触れる
Meaning
to experience an emotion or physical sensation; to touch something
Example
I feel happy when I see my friends.
友達を見ると、私は幸せを感じます。
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。
A1 noun /ˈfɑːðər/

father

幸福
Meaning
A male parent of a child.
Example
His father taught him how to ride a bicycle.
彼女は賞を受け取ったとき、その幸せを隠せなかった。
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 /ˌfɪɡjʊˈriːn/

figurine

小さな装飾用の像
Meaning
a small ornamental statue or model of a human or animal
Example
She bought a porcelain figurine of a dancing ballerina.
彼女はダンスをするバレリーナの陶器のフィギュリンを買いました。
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。
B2 noun /ˌfiː.ɑːnˈseɪ/

Fiancee

婚約者
Meaning
a woman who is engaged to be married
Example
John bought a beautiful engagement ring for his fiancee.
ジョンは彼の婚約者に美しい婚約指輪を買いました。
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。
B2 noun /fɔːrˈmeɪʃən/

formation

形成
Meaning
the action of forming or process of being formed
Example
The formation of the new company took several months.
新しい会社の形成には数ヶ月かかりました。
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 noun /fɜːr/

Fur

毛皮
Meaning
thick hair covering the body of animals
Example
The cat's fur was soft and warm to touch.
猫の毛は触ると柔らかく温かかった。
B1 adverb /ˈfriːkwəntli/

Frequently

頻繁に; 定期的に; 多くの回数
Meaning
often; regularly; many times
Example
She frequently visits her grandmother on weekends.
彼女は週末に頻繁に祖母を訪れます。
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。
B2 noun /ˈflɒrɪst/

florist

花屋
Meaning
A person who sells and arranges flowers.
Example
We bought a bouquet from the local florist.
私たちは地元の花屋から花束を買いました。
B2 adverb /ˈfɜ:rst hænd/

First-hand

直接; 原始の源から
Meaning
directly experienced or obtained; from the original source
Example
I experienced the earthquake first-hand.
私は地震を直接体験しました。
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。
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。
B1 verb /ˈfɛri/

ferry

フェリーで運ぶ
Meaning
to transport by boat; to carry back and forth
Example
The boat ferried passengers across the river.
船は乗客を川の向こうに運びました。
C2 noun ˌfjuːmɪˈɡeɪʃən

fumigation

燻蒸
Meaning
The practice of disinfecting or purifying an area using gas or smoke.
Example
Fumigation is an effective method to control pest infestations.
消毒は害虫の侵入を制御するための効果的な方法です。
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 /ˈflɔː.ləs/

Flawless

完璧な; 欠陥なし
Meaning
perfect; without any defects or faults; immaculate
Example
Her flawless performance earned her a standing ovation.
彼女の完璧なパフォーマンスは、スタンディングオベーションを得た。
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。
C2 verb /ˌfɔːrɔːrˈdeɪn/

foreordain

前もって定める
Meaning
to determine or decree something in advance; to predestine
Example
Some believe that our lives are foreordained by fate.
いくつかの人々は、私たちの人生は運命によって予め定められていると信じています。
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。
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 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 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 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。
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。
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。
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。
A2 verb /feɪl/

fail

失敗する
Meaning
to not succeed in achieving something; to be unsuccessful
Example
He failed to complete the assignment on time.
彼は時間通りに課題を完了することに失敗した。
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.
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.
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 /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。
B2 adjective /ˈfʌsi/

fussy

わがまま
Meaning
hard to please; very concerned with details
Example
The child is very fussy about what she eats.
その子供は食べるものにとてもわがままです。
C2 verb /ˈfæmɪʃ/

famish

飢える
Meaning
to suffer or cause to suffer from extreme hunger
Example
The stranded hikers began to famish after several days without food.
数日間食べ物がなくて、遭難したハイカーたちは飢えることを始めた。
A2 number /ˈfɪfti/

fifty

五十
Meaning
the number 50
Example
The stadium can hold fifty thousand people.
スタジアムは五万人を収容できます。
B1 noun /ˈfʌndɪŋ/

funding

資金調達
Meaning
financial support for a project or organization
Example
The startup is seeking funding from investors.
スタートアップは投資家から資金調達を試みています。
C1 adjective /ˈfrɔːdjʊlənt/

fraudulent

詐欺的な
Meaning
Involving or using deceit, especially criminal deception.
Example
He was arrested for making fraudulent insurance claims.
彼は詐欺的な保険金請求を行ったため逮捕されました。
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。
B2 noun /foʊm/

Foam

Meaning
a mass of small bubbles formed on or in liquid; frothy white mass
Example
The waves crashed against the rocks, creating white foam on the shore.
波が岩にぶつかり、浜辺に白い泡を作った。
A2 adjective /ˈfuː.lɪʃ/

Foolish

愚か; 馬鹿; ばかげた
Meaning
lacking good sense or judgment; unwise; silly
Example
It was foolish of him to drive in such heavy rain.
そんな激しい雨の中で運転するのは愚かだった。
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 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。
B2 noun /ˈfræɡ.mənt/

Fragment

断片; 部分;
Meaning
a small part broken or separated off something; an incomplete or isolated portion
Example
Archaeologists found fragments of ancient pottery buried in the soil.
考古学者たちは土の中で古代の陶器の断片を発見しました。
B2 noun /fiːst/

Feast

祝宴; 宴会
Meaning
a large meal, typically one in celebration of something; an annual religious celebration
Example
The wedding feast included traditional dishes from both families' cultures.
結婚式の祝宴には両家の文化からの伝統的な料理が含まれていました。
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。
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。
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。
B2 verb /fjuːz/

fuse

融合する
Meaning
To join or blend two or more things together into one.
Example
The two metals fused under high heat.
二つの金属は高温で融合した。
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。
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。
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 noun /foʊ/

foe

Meaning
an enemy or opponent
Example
The knight fought bravely against his foe.
騎士は勇敢に自分の敵と戦った。
C1 adjective /ˈfɪɡərətɪv/

figurative

比喩的
Meaning
not literal; using figures of speech or symbolic representation
Example
She used figurative language to describe her feelings.
彼女は感情を表現するために比喩的な言葉を使いました。
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 adjective /frɛʃ/

fresh

新鮮
Meaning
new, recently made, or clean and pure
Example
The bread is still fresh from the oven.
パンはオーブンから出たばかりです。
C1 noun /flʌks/

flux

フロー
Meaning
continuous change or movement; the rate of flow of something
Example
The company was in a state of constant flux during the reorganization.
会社は再編成の間、絶え間ない変化の中にありました。
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。
A2 noun /frɪdʒ/

fridge

冷蔵庫
Meaning
a household appliance used to keep food and drinks cold to preserve freshness
Example
I put the milk back in the fridge after breakfast.
朝食の後で牛乳を冷蔵庫に入れました。
C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

逃亡者
Meaning
a person who has escaped from a place or is in hiding, especially to avoid arrest
Example
The police launched a manhunt to capture the fugitive who escaped from prison.
警察は刑務所から逃げた逃亡者を捕まえるために捜索を開始しました。
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。
C2 noun /ˈfræŋkɪnsɛns/

frankincense

お香
Meaning
An aromatic gum resin used in incense and perfumes, often in religious ceremonies.
Example
The temple was filled with the sweet smell of burning frankincense.
寺院は燃えるお香の甘い香りで満ちていました。
C1 adverb /ˈfeɪ.təl.i/

Fatally

致命的に
Meaning
in a way that causes death; with deadly consequences; critically
Example
The accident fatally injured two passengers.
事故は二人の乗客を致命的に負傷させた。
B2 noun, verb /ˈfaɪlɪŋ/

filing

書類提出; 書類の整理
Meaning
the act of submitting documents; the process of organizing papers
Example
The lawyer handled the filing of all court documents.
弁護士はすべての裁判所文書の提出を扱いました。
B2 noun /fɔːrt/

Fort

Meaning
a strong building or group of buildings where soldiers live and defend
Example
The ancient fort stood on top of the hill for centuries.
古代のフォートは何世代にもわたって丘の上に立っていました。
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。
C2 verb /ˈfʊl.mɪ.neɪt/

fulminate

強く抗議する
Meaning
To express strong protest or criticism loudly and forcefully; to explode violently.
Example
The politician began to fulminate against corruption.
政治家は腐敗に強く抗議し始めた。
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。
C1 noun /ˈfoʊ.kəs ˈtræk.ɪŋ/

focus tracking

フォーカス追跡
Meaning
A technique of monitoring and maintaining attention on specific tasks or goals.
Example
Proper focus tracking improves productivity.
適切なフォーカス追跡は生産性を向上させます。
B2 adjective /ˈfeɪvərəbl/

favourable

好都合な
Meaning
Expressing approval, support, or positivity; advantageous or beneficial
Example
The weather conditions were favourable for the outdoor event.
屋外イベントの天候は好都合でした。
A2 noun ˈfriː.dəm

freedom

自由
Meaning
The power or right to act, speak, or think as one wants without hindrance or restraint.
Example
Freedom empowers self-expression.
自由は自己表現を促進します。
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。
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。
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。
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。
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。
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.
C1 noun, verb /ˈfɛrɪt/

ferret

フェレット, 何かを粘り強く探すまたは発見する
Meaning
a small domesticated animal used for hunting; to search or uncover something persistently
Example
He ferreted out the hidden documents.
彼は隠された書類を見つけました。
B1 noun /frʌˈstreɪʃən/

frustration

フラストレーション
Meaning
The feeling of being upset or annoyed due to inability to achieve something.
Example
He felt deep frustration when his plans failed.
彼は自分の計画が失敗したとき、深いフラストレーションを感じました。
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。
C1 adjective /fərˈlɔːrn/

forlorn

孤独な, 絶望的な
Meaning
extremely sad, lonely, or abandoned
Example
The abandoned puppy looked so forlorn in the rain.
放置された子犬は雨の中でとても悲しそうに見えました。
C2 adjective /ˈfraʊzi/

frowsy

だらしない
Meaning
Scruffy and neglected in appearance; musty or stale in smell.
Example
He wore a frowsy old jacket that smelled of damp.
彼はだらしない古いジャケットを着ていて、それは湿気の匂いがしました。