foreknowledge
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C2 noun /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

预知
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
先知声称他预知了这个事件。
C2 adjective /ˈfækʃəs/

factious

分裂的
Meaning
causing disagreement or division within a group; inclined to form factions
Example
The debate became factious, splitting the committee into rival camps.
辩论变得分裂，委员会被分成了对立的阵营。
C2 verb /ˈflædʒəˌleɪt/

flagellate

鞭打或以惩罚或自我约束的方式鞭打自己
Meaning
to whip or flog someone, either literally or as a form of punishment or self-discipline
Example
In history, some monks would flagellate themselves as penance.
在历史上，一些僧侣会因忏悔而鞭打自己。
C2 verb /fɔrˈswɛr/

forswear

放弃
Meaning
to renounce or reject; to give up completely
Example
He forswore his old habits and started a new life.
他放弃了旧习惯，开始了新的生活。
C2 adjective /ˈfʌndʒəbl/

fungible

可替代的
Meaning
interchangeable; able to replace or be replaced by another identical item
Example
In finance, money is considered a fungible asset.
在金融领域，钱被视为一种可替代资产。
C2 verb /ˈfrɪzəl/

frizzle

将食物炸至变脆并卷曲
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.
培根在锅中开始发出滋滋声。
C2 adjective /ˈfiːbraɪl/

febrile

发烧的，激动的
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.
患者处于高温状态下的发烧状态。
C2 adjective /ˈfiːbəlˌmaɪndɪd/

feebleminded

愚蠢或心智薄弱
Meaning
lacking intelligence or mental capacity; foolish or weak-minded
Example
The feebleminded man struggled to understand basic instructions.
那个心智薄弱的人很难理解基本的指示。
C2 adjective /ˈfæn.sɪ.ləs/

fanciless

没有想象力的，普通的
Meaning
without imagination or creativity; plain or ordinary
Example
His drawings were simple and fanciless.
他的画作既简单又没有想象力。
C2 noun /ˈflɒtsəm/

flotsam

漂浮的残骸
Meaning
Floating debris from a shipwreck or things discarded and left floating.
Example
The beach was littered with flotsam after the storm.
暴风雨后，海滩上充满了漂浮的残骸。
C2 adjective /ˈfer.əs/

ferrous

含铁的
Meaning
containing or consisting of iron
Example
Ferrous metals are commonly used in construction.
铁金属常用于建筑中。
C2 verb /fɔːrˈfɛnd/

forfend

保护, 防卫, 避免
Meaning
to protect or defend against something undesirable; to prevent
Example
May good fortune forfend any danger from our journey.
愿好运保护我们，避免任何危险。
C2 verb /ˈfʌdəl/

fuddle

使困惑
Meaning
To confuse or stupefy, especially with alcohol or overwhelming information.
Example
The complicated instructions fuddled the new employees.
复杂的指令使新员工感到困惑。
C2 adjective /ˈfʊl.səm/

fulsome

过度的赞美
Meaning
Excessively flattering or insincere; abundant or generous in amount.
Example
He offered fulsome praise to his boss.
他给老板提供了过度的赞美。
C2 noun /flæks/

flax

亚麻
Meaning
a plant whose fibers are used to make linen and whose seeds are edible
Example
Flax is often used in making linen fabrics.
亚麻常用于制作亚麻织物。
C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

冷水池
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.
罗马的冷水池遗址今天仍可见。
C2 noun /ˈfɔːrʃɔːr/

foreshore

海滩
Meaning
The part of the shore between the high and low tide marks
Example
Children were playing on the foreshore, collecting shells.
孩子们在海岸上玩耍，捡贝壳。
C2 verb /frɪsk/

frisk

搜查
Meaning
To search a person by patting their clothing to check for concealed items.
Example
The security guard frisked the man at the entrance.
安保人员在入口处搜查了那名男子。
C2 noun /ˈfʌstɪən/

fustian

浮夸的演讲
Meaning
pompous or pretentious speech or writing; originally a type of thick cloth
Example
The politician's speech was filled with fustian and empty promises.
政治家的演讲充满了浮夸和空洞的承诺。
C2 noun /fækˈsɪmɪli/

facsimile

传真副本
Meaning
an exact copy or reproduction of a document
Example
He sent a facsimile of the contract to the client.
他把合同的传真副本发送给了客户。
C2 verb /feɪz/

faze

打扰
Meaning
to disturb or disconcert someone; to cause to feel unsettled
Example
She was not fazed by the unexpected question.
她没有被意外问题扰乱。
C2 noun /ˈfrækɑː/

fracas

纷争
Meaning
A noisy disturbance or quarrel.
Example
The fracas outside the bar drew the attention of the police.
酒吧外的纷争引起了警察的注意。
C2 adjective /ˈfʌŋɡəs/

fungous

像真菌一样
Meaning
relating to or resembling a fungus
Example
The damp basement had a fungous smell.
潮湿的地下室有一种像真菌一样的气味。
C2 noun /feɪt/

fete

节日，庆典
Meaning
a celebration or festival, often in honor of someone
Example
The village held a grand fete to celebrate the harvest.
村庄举行了盛大的节日庆典来庆祝丰收。
C2 adjective /ˈfɪt.fəl/

fitful

间歇性
Meaning
occurring in irregular bursts; not continuous or steady
Example
He had a fitful sleep due to the storm.
由于暴风雨，他有间歇性的睡眠。
C2 noun /friːz/

frieze

浮雕带
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.
入口上方的浮雕带描绘了古代神话中的场景。
C2 noun /ˈfoʊksl/

forecastle

船首舱
Meaning
The forward part of a ship below the deck, traditionally used as living quarters for the crew.
Example
The sailors gathered in the forecastle after their shift.
水手们在他们的班次结束后聚集在船首舱。
C2 adjective /ˈflɒrɪd/

florid

过度装饰的 / 红润
Meaning
Having a red or flushed complexion; or excessively ornate and intricate.
Example
The speaker’s florid style made the lecture hard to follow.
演讲者过度装饰的风格使得讲座难以理解。
C2 noun /ˈfriːˌbuːtər/

freebooter

海盗
Meaning
A pirate or plunderer who roams freely in search of wealth.
Example
The freebooter raided the merchant ships along the coast.
海盗袭击了沿海的商船。
C2 adjective /ˈfrəʊərd/

froward

固执的
Meaning
Difficult to deal with; contrary and disobedient.
Example
The teacher found the froward child hard to manage.
老师发现固执的孩子很难管理。
C2 adjective/adverb /feɪn/

fain

心甘情愿地, 乐意地
Meaning
gladly, willingly, or with pleasure
Example
I would fain help you if I had the time.
如果我有时间，我会很乐意帮你。
C2 adjective /ˈfrɛtfəl/

fretful

焦虑的
Meaning
Feeling or showing distress or irritation.
Example
The baby was fretful all night and could not sleep.
宝宝整晚都很焦虑，无法入睡。
C2 verb /ˈfɛtər/

fetter

束缚，限制
Meaning
to restrain or restrict someone’s freedom
Example
The strict rules fettered the creativity of the students.
严格的规则限制了学生们的创造力。
C2 verb /fɪˈlɪsɪˌteɪt/

felicitate

庆祝
Meaning
to congratulate; to express good wishes
Example
We felicitated the graduating students at the ceremony.
我们在典礼上祝贺了毕业生。
C2 noun /ˈfæn.feər/

fanfare

盛大场面, 宣传
Meaning
a short ceremonial tune or display of publicity to attract attention
Example
The new product was launched with much fanfare.
新产品在盛大场面下发布。
C2 adjective /ˈfrɪski/

Frisky

活泼的; 精力充沛的; 爱玩的; 淘气的
Meaning
lively; energetic; playful; mischievous
Example
The frisky puppy ran around the garden playfully.
那只活泼的小狗在花园里欢快地奔跑。
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.
毛皮商人在他的店里展示了精美的大衣。
C2 noun /ˈfɜːrnəri/

fernery

蕨类植物培育园，培养蕨类植物的地方
Meaning
a place or greenhouse where ferns are cultivated
Example
The garden's fernery was full of exotic plants.
花园的蕨类植物培育园里充满了异国植物。
C2 verb /fɔːrˈdʒʌdʒ/

forejudge

预先判断
Meaning
To judge beforehand without adequate information.
Example
It is unfair to forejudge someone without knowing the facts.
在没有了解事实的情况下对某人做出判断是不公平的。
C2 verb /ˌfɔːrɔːrˈdeɪn/

foreordain

预定
Meaning
to determine or decree something in advance; to predestine
Example
Some believe that our lives are foreordained by fate.
一些人相信我们的生活是命运预定的。
C2 verb /foʊˈmɛnt/

foment

煽动
Meaning
To instigate or stir up (an undesirable or violent sentiment or course of action).
Example
The rebel leader tried to foment unrest among the people.
叛乱领袖试图在人民中煽动骚乱。
C2 adjective /ˈfiːtɪd/

foetid

恶臭的
Meaning
having an offensive, unpleasant smell
Example
The foetid smell from the garbage made it hard to breathe.
垃圾散发出的恶臭使得呼吸变得困难。
C2 noun /ˈfɔɪbəl/

foible

小缺点
Meaning
A minor weakness or eccentricity in someone's character.
Example
She loved him despite his little foibles.
尽管有一些小缺点，她依然爱他。
C2 noun /ˈfræŋkɪnsɛns/

frankincense

乳香
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.
寺庙里充满了燃烧乳香的甜美气味。
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.
C2 adjective /ˈfrɒlɪksəm/

Frolicsome

顽皮的; 快乐的; 活泼的
Meaning
joyful; playful; merry; cheerful
Example
The frolicsome children laughed and played in the park.
顽皮的孩子们在公园里笑着玩耍。
C2 adjective /ˈfraʊzi/

frowsy

邋遢
Meaning
Scruffy and neglected in appearance; musty or stale in smell.
Example
He wore a frowsy old jacket that smelled of damp.
他穿着一件邋遢的旧夹克，散发着潮湿的气味。
C2 adverb /ˌfɔːrθˈwɪθ/

Forthwith

立即; 无延迟; 马上
Meaning
immediately; without delay; at once
Example
The manager ordered the employee to stop the unsafe practice forthwith.
经理命令员工立即停止危险的做法。
C2 noun /fləˈtɪlə/

flotilla

小型舰队
Meaning
A small fleet of ships or boats operating together.
Example
A flotilla of fishing boats left the harbor at dawn.
一支渔船的舰队在黎明时分离开港口。
C2 adjective/noun /fɪˈduː.ʃi.er.i/

fiduciary

信托的
Meaning
Involving trust, especially with regard to the relationship between a trustee and a beneficiary.
Example
Banks have fiduciary duties towards their clients.
银行对客户有信托责任。
C2 noun /floʊ/

floe

浮冰
Meaning
a large sheet of floating ice
Example
The polar bears rested on the ice floe.
北极熊在浮冰上休息。
C2 noun /ˈfɜːrðərəns/

furtherance

促进
Meaning
The advancement or promotion of something.
Example
The new policy was introduced in furtherance of social justice.
新政策是为了促进社会公正而引入的。
C2 adjective /fjuːˈnɪəriəl/

funereal

葬礼的
Meaning
having the mournful, somber character of a funeral
Example
The room was filled with a funereal silence after the announcement.
宣布后，房间里充满了葬礼般的沉默。
C2 adjective /ˈfædɪʃ/

faddish

短暂的时尚
Meaning
Following a temporary trend or fashion
Example
Wearing neon clothes was a faddish style in the 1980s.
穿着霓虹服装在1980年代是一种时尚。
C2 noun ˌfjuːmɪˈɡeɪʃən

fumigation

熏蒸
Meaning
The practice of disinfecting or purifying an area using gas or smoke.
Example
Fumigation is an effective method to control pest infestations.
熏蒸是一种有效的控制害虫侵扰的方法。
C2 verb /ˈfæmɪʃ/

famish

挨饿
Meaning
to suffer or cause to suffer from extreme hunger
Example
The stranded hikers began to famish after several days without food.
困住的徒步旅行者在没有食物的几天后开始感到饥饿。
C2 noun /fluː/

flue

烟道
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.
烟囱的烟道需要定期清理。
C2 noun /frɒnd/

frond

叶子
Meaning
A large, divided leaf of a fern, palm, or similar plant.
Example
The fern's frond stretched gracefully over the garden path.
蕨类植物的叶片优雅地伸展在花园小路上。
C2 adjective /ˈflaɪti/

flighty

不稳定
Meaning
unstable, impulsive, or easily distracted; lacking seriousness or stability
Example
She’s too flighty to stick with one job for long.
她太不稳定了，无法在一份工作上呆太长时间。
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.
车停在酒店的前庭里。
C2 adjective /ˈfʌsti/

fusty

陈腐的，霉臭的
Meaning
smelling stale, damp, or stuffy; old-fashioned
Example
The room smelled fusty after being closed for months.
房间在关了几个月后有了陈腐的味道。
C2 adjective /ˈfʊtˌluːs/

footloose

自由自在
Meaning
Free to go anywhere or do anything; not tied down by responsibilities.
Example
After graduating, he felt footloose and ready to explore the world.
毕业后，他感到自由自在，准备探索这个世界。
C2 noun /ˌfoʊ.mənˈteɪ.ʃən/

fomentation

煽动，激起
Meaning
The action of instigating or stirring up; also the application of warm substances to the body to ease pain.
Example
His speech led to the fomentation of violence in the region.
他的演讲导致了该地区暴力的激化。
C2 noun /ˈfrɛs.koʊ/

fresco

壁画
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.
教堂的墙壁装饰着美丽的壁画。
C2 noun /fɪntʃ/

finch

雀鸟（小型歌唱鸟）
Meaning
a small songbird with a short, stout bill
Example
A colorful finch perched on the branch singing sweetly.
一只五彩斑斓的雀鸟栖息在树枝上，甜美地唱着歌。
C2 noun /ˈfaɪnəri/

finery

昂贵或精致的衣服
Meaning
expensive or elaborate clothes, decorations, or accessories
Example
She attended the party in her finest finery.
她穿着最好的衣服参加了聚会。
C2 noun /ˈfɪli/

filly

小母马
Meaning
a young female horse
Example
The filly ran swiftly across the meadow.
这匹小母马在草地上跑得很快。
C2 adjective /fjuːˈɡeɪʃəs/

fugacious

短暂的
Meaning
Lasting only a short time; fleeting or ephemeral.
Example
Youth is beautiful but fugacious.
青春是美丽的，但它是短暂的。
C2 noun /ˈfɛndər/

fender

挡泥板
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.
汽车的芬德尔在事故中被压凹了。
C2 adjective /ˈfluːviəl/

fluvial

与河流相关
Meaning
relating to or found in a river
Example
The fluvial deposits indicated the presence of an ancient river system.
河流沉积物表明了古老河流系统的存在。
C2 adverb /ˈfɔːrbi/

forby

此外
Meaning
In addition; besides (archaic Scottish/English word).
Example
He is kind and generous, and wise forby.
他是仁慈和慷慨的，并且此外还是智慧的。
C2 adjective /ˈfuːlˌhɑːrdi/

foolhardy

轻率的
Meaning
Recklessly bold or rash; taking foolish risks.
Example
It was foolhardy of him to climb the mountain without proper gear.
他在没有适当装备的情况下攀登山峰，真是轻率的行为。
C2 verb /fɪltʃ/

filch

偷
Meaning
to steal something in a sneaky or petty way
Example
He tried to filch a candy bar from the shop.
他试图从商店偷一块糖果。
C2 adjective /ˈfʊl.dʒənt/

fulgent

闪耀
Meaning
Shining brightly; dazzling.
Example
The fulgent stars lit up the night sky.
闪耀的星星照亮了夜空。
C2 noun /ˌfjuːzɪˈleɪd/

fusillade

齐射
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.
士兵们在一阵齐射下前进。
C2 adjective /ˈfluːtɪd/

fluted

有沟槽的
Meaning
having grooves or ridges, often for decoration
Example
The vase had a beautiful fluted design around the rim.
花瓶的边缘有一个美丽的有沟槽的设计。
C2 noun /fez/

Fez

费兹帽
Meaning
a cone-shaped red hat with a tassel, traditionally worn by men in some Middle Eastern countries
Example
The traditional costume included a red fez with a black tassel.
传统服饰包括一顶红色的费兹帽和一个黑色的流苏。
C2 noun /feɪnt/

feint

假动作, 伪装动作
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.
拳击手在打右拳之前做了一个左侧的假动作。
C2 noun /ˈfrɛʃɪt/

freshet

突然的河流泛滥
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.
暴风雨过后，河流变成了猛烈的freshet。
C2 verb /fɔːrˈboʊd/

forebode

预示
Meaning
To predict or have a strong inner feeling of a future misfortune or evil.
Example
Dark clouds forebode a coming storm.
乌云预示着即将到来的风暴。
C2 noun /ˈfriːˌθɪŋkər/

freethinker

自由思想者
Meaning
A person who forms opinions based on reason and independent thought rather than tradition or authority.
Example
Voltaire was considered a great freethinker of his time.
伏尔泰被认为是他时代伟大的自由思想家。
C2 noun /foʊ ˈpɑː/

faux pas

社交失误
Meaning
a social blunder or mistake in etiquette
Example
He committed a major faux pas by forgetting her birthday.
他因为忘记她的生日而犯了一个大社交失误。
C2 noun /ˈfɪlɪɡri/

filigree

精致的装饰工艺，通常由金或银制成
Meaning
delicate ornamental work of fine wire, usually of gold or silver
Example
The necklace was decorated with intricate gold filigree.
项链上装饰着精致的金质镶嵌工艺。
C2 verb /ˈflʌməks/

flummox

困惑
Meaning
To confuse or bewilder someone completely.
Example
The complicated puzzle flummoxed the students.
复杂的拼图让学生们困惑。
C2 noun /fəˈlɪsɪti/

felicity

幸福
Meaning
intense happiness; the ability to find appropriate expression for one's thoughts
Example
She was known for her felicity in conversation and cheerful nature.
她因在对话中的幸福和开朗的性格而闻名。
C2 noun /ˈflæt.ər.ər/

Flatterer

奉承者
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.
国王被奉承者围绕，他们只告诉他他想听的话。
C2 noun /fækˈtoʊtəm/

factotum

全能工人
Meaning
an employee who does many different types of work; a general servant
Example
He worked as a factotum, handling both clerical and maintenance duties.
他作为一个全能工人工作，处理行政和维护任务。
C2 adjective /ˈfiːkənd/

fecund

肥沃的, 高产的
Meaning
producing or capable of producing an abundance of offspring or new growth; fertile
Example
The fecund soil produced a bountiful harvest this year.
肥沃的土壤今年收获了丰盛的农作物。
C2 verb /fleɪl/

flail

狂乱地挥动或摇摆某物；挣扎
Meaning
to wave or swing something about wildly; to thrash about
Example
He flailed his arms to keep afloat in the water.
他挥动双臂以在水中保持漂浮。
C2 adjective /ˈfɛtɪd/

fetid

有恶臭的，令人不快的
Meaning
having a strong, unpleasant smell
Example
The fetid smell from the garbage was unbearable.
垃圾散发出的恶臭让人无法忍受。
C2 verb /fɪˈneɪɡəl/

finagle

通过聪明或欺骗得到某物
Meaning
to obtain something by cleverness or trickery
Example
He finagled a free ticket by pretending to be a VIP guest.
他通过假装是VIP客人来获得了一张免费票。
C2 adjective /ˈfɛkləs/

feckless

无能的, 不负责任的
Meaning
lacking initiative or strength of character; irresponsible
Example
His feckless attitude at work caused several missed deadlines.
他在工作中的无能态度导致了多个错过的最后期限。
C2 adjective /fluːˈɛnʃəl/

fluential

有影响力的
Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
有影响力的演讲者吸引了所有观众。
C2 noun /ˌfɔːrɔːrdɪˈneɪʃən/

foreordination

预定
Meaning
the act of determining something in advance; predestination
Example
The doctrine of foreordination suggests that events are fixed by divine will.
预定论教义认为，事件是由神的意志所决定的。
C2 noun /ˈfɔːltˌfaɪndər/

faultfinder

找茬者
Meaning
a person who habitually finds fault with others
Example
He is such a faultfinder that nothing anyone does is ever good enough.
他是一个找茬者，任何人做的事情都永远不够好。
C2 adjective /ˈfraɪəbl/

friable

脆弱
Meaning
Easily crumbled or reduced to powder.
Example
The old brick wall was friable and broke apart at a touch.
那堵老砖墙是脆弱的，轻轻一碰就破裂了。
C2 verb /flɛdʒ/

fledge

飞翔
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.
年轻的鸟将在几周内学会飞行。
C2 adjective /ˈflɪpənt/

flippant

轻浮的
Meaning
not showing a serious or respectful attitude
Example
His flippant remarks annoyed the teacher.
他轻浮的言论惹怒了老师。
C2 adjective /ˈfɒksi/

foxy

狡猾
Meaning
Clever, cunning, or attractive.
Example
He came up with a foxy plan to win the game.
他想出了一个狡猾的计划来赢得比赛。
C2 verb /fɔɪst/

foist

强加
Meaning
To impose something unwelcome or unnecessary on someone.
Example
He tried to foist his old books onto his friends.
他试图把他的旧书强加给朋友们。
C2 adjective /fəˈloʊniəs/

felonious

与严重犯罪相关
Meaning
relating to or involved in serious criminal activity
Example
He was charged with felonious assault after the incident.
事件发生后，他因严重袭击被指控。
C2 adjective /ˈfɜːr.vɪd/

Fervid

热情的; 极为热衷的; 满怀激情的
Meaning
passionate; intensely enthusiastic; burning with emotion
Example
She gave a fervid speech about environmental protection.
她发表了一篇关于环境保护的热情演讲。
C2 adjective /ˈflʌməksd/

flummoxed

困惑的
Meaning
Completely confused or bewildered.
Example
He looked flummoxed after hearing the strange question.
他听到那个奇怪的问题后，看起来很困惑。
C2 noun /ˈfiːæt/

fiat

法令，命令
Meaning
an official order or decree; authoritative command
Example
The new policy was enacted by royal fiat.
新政策通过皇帝的命令实施。
C2 verb /flɪt/

flit

飞来飞去
Meaning
to move quickly and lightly from one place to another
Example
Butterflies flitted from flower to flower.
蝴蝶在花间飞来飞去。
C2 noun /ˈfrɔːdjʊləns/

fraudulence

欺诈
Meaning
The quality or state of being fraudulent; deceitfulness.
Example
The audit revealed fraudulence in the financial statements.
审计揭示了财务报表中的欺诈行为。
C2 noun /ˈfɒpəri/

foppery

浮夸
Meaning
Foolish or excessive concern with one's appearance or manners; pretentious behavior.
Example
His obsession with fashion was dismissed as mere foppery.
他对时尚的痴迷被当作浮夸。
C2 verb /ˈfɜːrbɪʃ/

furbish

抛光
Meaning
to polish, renovate, or give a fresh look to something
Example
The workers furbished the old sword until it gleamed like new.
工人们把旧剑抛光，直到它像新的一样闪闪发光。
C2 noun /ˈfɜːrlɔːŋ/

furlong

距离单位（220码或大约201米）
Meaning
a unit of distance equal to 220 yards or about 201 meters
Example
The horse ran a furlong before slowing down.
马跑了一个弗隆后才减速。
C2 noun /fluːk/

fluke

侥幸
Meaning
A stroke of luck; an unexpected piece of good fortune.
Example
Winning the lottery was a complete fluke.
中彩票简直就是一次完全的侥幸。
C2 adjective /fɪˈdjuːʃəl/

fiducial

信任的，作为参考标准的
Meaning
based on trust or confidence; serving as a standard of reference
Example
The fiducial point on the map ensures accurate measurements.
地图上的菲杜西亚尔点确保了精确的测量。
C2 adjective /fəˈlɪsɪtəs/

felicitous

恰当的, 合适的或令人愉快的; 由好运或幸福标志
Meaning
well-chosen, appropriate, or pleasing; marked by good fortune or happiness
Example
She made a felicitous remark that lightened the mood.
她做了一个恰到好处的评论，使气氛轻松了。
C2 adjective /ˈfætʃuəs/

fatuous

愚蠢
Meaning
silly or foolish, especially in a self-satisfied way
Example
His fatuous comments during the meeting annoyed everyone.
他在会议中的愚蠢评论让所有人都感到烦恼。
C2 verb /ˈfɛstər/

fester

恶化, 加剧
Meaning
to become worse or more intense, often through neglect or infection
Example
If grievances are ignored, they may fester into resentment.
如果不理会抱怨，它们可能会变成怨恨。
C2 adjective /ˈfjuːzəbl/

fusible

可熔化的
Meaning
Capable of being melted or fused.
Example
The engineer used a fusible alloy in the experiment.
工程师在实验中使用了可熔化的合金。
C2 adjective /ˈflæb.i/

Flabby

松软且松弛; 缺乏紧实或肌肉张力; 虚弱
Meaning
soft and loose; lacking firmness or muscle tone; weak
Example
His flabby arms showed he needed to exercise more.
他松弛的手臂显示他需要更多的锻炼。
C2 noun /flɛk/

fleck

小斑点
Meaning
a small spot or mark, often of a different color
Example
There was a fleck of paint on the floor.
地板上有一个小斑点。
C2 adjective /ˈfɛstəl/

festal

节日的，庆祝的
Meaning
relating to a festival or celebration
Example
The hall was decorated in a festal manner for the wedding.
婚礼的大厅被装饰得节日气氛十足。
C2 adjective /ˈfæləbl/

fallible

容易犯错
Meaning
capable of making mistakes or being wrong
Example
Even experts are fallible and can make errors.
即使是专家也会犯错。
C2 verb /ˌfɔːrˈrʌn/

forerun

预示
Meaning
To go before; to precede in time, place, or action.
Example
Dark clouds often forerun a storm.
乌云常常预示着暴风雨。
C2 noun /foʊl fʊt/

Foal-foot

马蹄花
Meaning
a yellow flowering plant with leaves shaped like a horse's hoof, also known as coltsfoot
Example
The foal-foot plant grows wild in many meadows and is often the first flower to bloom in spring.
马蹄花在许多草地上野生生长，通常是春天最早开花的花。