freebooter
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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 /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 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 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 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 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 /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 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 /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 /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 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 verb /ˈfrʌktɪˌfaɪ/

fructify

使…成果丰硕
Meaning
To make fruitful or productive; to bear fruit.
Example
The new policies will help fructify the economic potential of the region.
新的政策将有助于使该地区的经济潜力丰产。
C2 noun /ˈflɛdʒlɪŋ/

fledgeling

初生小鸟
Meaning
A young bird that has just developed its feathers and is learning to fly; a beginner.
Example
The fledgeling was trying hard to take its first flight.
那只初生小鸟正在努力做第一次飞行。
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 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 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 /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 adjective /ˈfɪnɪki/

finicky

难以取悦; 对细节非常挑剔
Meaning
difficult to please; very particular about details
Example
He is so finicky about his food that he only eats organic vegetables.
他对食物要求如此挑剔，甚至只吃有机蔬菜。
C2 noun /flɔːˈrɛsəns/

florescence

开花期
Meaning
The process, state, or period of flowering.
Example
The garden reached its peak florescence in spring.
花园在春天达到了它的盛开时期。
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 adjective /ˈfrɒθi/

frothy

泡沫丰富
Meaning
Full of or covered with small bubbles; light and insubstantial.
Example
She ordered a cup of frothy cappuccino.
她点了一杯泡沫丰富的卡布奇诺。
C2 noun /ˈfɔːθ.raɪt.nəs/

forthrightness

直率
Meaning
The quality of being honest and straightforward; directness.
Example
Her forthrightness made her a respected journalist.
她的直率使她成为一名受人尊敬的记者。
C2 noun /fɔːrˈbɛrəns/

forbearance

宽容
Meaning
Patient self-control; restraint and tolerance, especially in difficult situations.
Example
She showed remarkable forbearance during the heated argument.
她在激烈的争论中表现出了非凡的宽容。
C2 noun /ˈflæɡ ˌɒfɪsər/

flag-officer

旗官
Meaning
a senior naval officer entitled to fly a flag to mark the command
Example
The flag-officer reviewed the fleet before the ceremony.
旗官在仪式前检查了舰队。
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 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 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 /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 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 /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 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 /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 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 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 noun /ˈfuːləri/

foolery

愚蠢
Meaning
Silly or foolish behavior or actions.
Example
His constant foolery made the meeting hard to take seriously.
他不断的愚蠢让会议变得难以认真对待。
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 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 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 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 /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 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 /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.
农民将土地休耕，以恢复土壤肥力。
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 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 verb /fleɪ/

flay

剥皮/严厉批评
Meaning
to strip off the skin of something or criticize severely
Example
The chef flayed the fish before cooking it.
厨师在烹饪前剥去了鱼的皮。
C2 noun /ˈfiːəlti/

fealty

忠诚与效忠
Meaning
loyalty or allegiance, especially to a sovereign or lord
Example
The knight swore fealty to his king.
骑士向国王宣誓效忠。
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 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 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 /fəˈsiːʃəs/

facetious

讽刺的
Meaning
Treating serious issues with deliberately inappropriate humor
Example
He was being facetious when he said he wanted to live on the moon.
他说他想住在月球上时，他是在开玩笑。
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 /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 /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 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 adjective /ˈfæð.əm.ləs/

fathomless

无法理解或测量的; 非常深
Meaning
impossible to understand or measure; very deep
Example
The ocean seemed fathomless as it stretched to the horizon.
海洋看起来是无法测量的，因为它一直延伸到地平线。
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 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 /fɔːn/

faun

法恩（神话生物）
Meaning
a mythological creature that is half human and half goat
Example
The sculpture depicted a playful faun dancing in the forest.
雕塑描绘了一个在森林里跳舞的顽皮法恩。
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 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 noun /ˈfaɪər.brænd/

firebrand

煽动者
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.
这位活动家是真正的煽动者，激励着周围的每个人参加抗议。
C2 noun /ˈfɪɡmənt/

figment

虚构，想象
Meaning
something invented or imaginary; a fabrication of the mind
Example
The story of the haunted house is just a figment of her imagination.
鬼屋的故事只是她想象的产物。
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 verb /ˈfɒn.dəl/

fondle

抚摸
Meaning
To stroke or caress lovingly or gently.
Example
She fondled the kitten gently in her lap.
她轻柔地抚摸着她膝盖上的小猫。
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 /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 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 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 /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 adjective fɔːˈtjuː.ɪ.təs

fortuitous

偶然的
Meaning
Happening by accident or chance rather than design; lucky or fortunate.
Example
Their meeting was purely fortuitous.
他们的相遇完全是偶然的。
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 noun /ˈfjʊr.ʌŋ.kəl/

Furuncle

脓肿; 坑;
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.
医生开了抗生素来治疗他脖子上疼痛的脓肿。
C2 adjective fəˈleɪ.ʃəs

fallacious

虚假的
Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
他的论点是基于虚假的推理。
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 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 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 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 /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 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 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 verb /ˈfrɪtər/

fritter

浪费
Meaning
To waste time, money, or energy on trivial matters.
Example
He frittered away his savings on unnecessary gadgets.
他把储蓄浪费在了不必要的电子产品上。
C2 adjective /ˈfæsaɪl/

Facile

容易的; 浅显的; 缺乏深度的
Meaning
easily achieved; superficial; lacking depth
Example
His facile explanation didn't address the real problem.
他的简单解释没有解决真正的问题。
C2 adjective /ˈflæs.ɪd/

Flaccid

软弱的; 无力的; 松弛的;
Meaning
soft and limp; lacking firmness; drooping
Example
The plant's leaves became flaccid after days without water.
在没有水的几天后，植物的叶子变得软弱无力。
C2 noun /fiːf/

fief

在封建制度下拥有的土地；一个控制区域或领域
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.
骑士因其服务而获得了领主授予的封地。
C2 verb /ˈfʊl.mɪ.neɪt/

fulminate

猛烈抗议
Meaning
To express strong protest or criticism loudly and forcefully; to explode violently.
Example
The politician began to fulminate against corruption.
政治家开始猛烈反对腐败。
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 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 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 noun /ˈfeɪ.tə.lɪ.zəm/

fatalism

宿命论
Meaning
the belief that all events are predetermined and inevitable
Example
He embraced fatalism, believing that nothing he did could change his destiny.
他接受了宿命论，相信无论他做什么，都无法改变他的命运。
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 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 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 /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 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 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 noun /ˈflætʃələns/

flatulence

消化系统中的气体积聚
Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
吃豆子有时会引起腹胀。
C2 verb /ˈfjuːmɪˌɡeɪt/

fumigate

熏蒸
Meaning
to disinfect or purify an area by using chemical fumes
Example
They fumigated the warehouse to kill the insects.
他们对仓库进行了熏蒸处理，以消灭昆虫。
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 noun /ˈfetiʃ/

fetich

费蒂什
Meaning
an object believed to have magical powers or to be inhabited by a spirit
Example
The villagers treated the statue as a powerful fetich.
村民把雕像视为一个强大的费蒂什。
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 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 /ˈfɪliəl/

filial

与儿子或女儿有关；表现出对父母的尊重或爱
Meaning
relating to a son or daughter; showing respect or affection toward parents
Example
He showed filial respect by caring for his aging parents.
他通过照顾年迈的父母展示了孝顺。
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 /ˈflɪpənsi/

flippancy

轻率
Meaning
lack of seriousness; showing a disrespectful or trivial attitude
Example
His flippancy during the meeting offended his colleagues.
他在会议中的轻率让同事们感到不悦。
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 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 /ˈfʌŋkʃəˌnɛri/

functionary

职员
Meaning
a person who has official duties in an organization, especially one with little authority
Example
The minor functionary was responsible for filing reports.
次要的职员负责提交报告。
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 /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 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 /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 /ˈfraʊzi/

frowzy

邋遢
Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
他在沙发上睡觉后，以邋遢的外貌走进了房间。
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 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 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 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 /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 /ˈfɒp.ɪʃ/

Foppish

过度关注个人外貌和衣服；对穿着虚荣
Meaning
excessively concerned with one's appearance and clothes; vain about dress
Example
His foppish behavior and expensive clothes made him stand out.
他的foppish行为和昂贵的衣服使他与众不同。
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 /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 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。