kernel
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C1 noun /ˈkɜːrnəl/

kernel

某物的核心; 坚果或种子的可食部分
Meaning
the central, most important part of something; the edible part of a nut or seed
Example
The kernel of the argument was about fairness.
争论的核心是关于公平的。
A2 adjective /noʊn/

known

已知的
Meaning
recognized or familiar; something that is identified or acknowledged
Example
He is a well-known actor in the country.
他是国内著名的演员。
B2 noun /ˈkɪdni/

Kidney

肾脏
Meaning
either of a pair of organs that filter waste products from the blood and produce urine
Example
Drinking plenty of water helps keep your kidneys healthy.
喝足够的水有助于保持肾脏健康。
C2 noun /kɪln/

kiln

窑炉
Meaning
a furnace or oven for burning, baking, or drying, especially one for firing pottery or bricks
Example
The potter placed the clay pots into the kiln for firing.
陶工将泥土罐放入窑炉中烧制。
A2 noun /ˈnɒl.ɪdʒ/

knowledge

知识
Meaning
Facts, information, and skills acquired through experience or education.
Example
Knowledge of the universe is expanding through research.
宇宙的知识正在通过研究不断扩展。
C1 noun /ˈkiːpˌseɪk/

keepsake

纪念品
Meaning
An object kept as a reminder of a person, place, or event.
Example
She gave me a small locket as a keepsake of our friendship.
她送给我一个小吊坠，作为我们友谊的纪念品。
B2 noun /ˈkiːɒsk/

kiosk

报摊
Meaning
A small, open-fronted hut or cubicle from which newspapers, refreshments, tickets, etc., are sold.
Example
She bought a bottle of water from the kiosk near the station.
她在车站附近的报摊买了一瓶水。
A2 noun /kaɪt/

Kite

秃鹰
Meaning
a bird of prey with long wings and a forked tail; also a toy flown in the air
Example
The kite soared high above the fields looking for prey.
风筝高高飞过田野寻找猎物。
B2 adjective /ˌkaɪnd ˈhɑːrtɪd/

kind-hearted

善良的
Meaning
Having a kind and generous nature; showing compassion and care for others.
Example
She is known as a kind-hearted teacher who always helps her students.
她作为一位善良的老师而闻名，总是帮助她的学生。
C2 noun /neɪv/

Knave

不诚实的人；游戏牌中的侍从
Meaning
a dishonest person, especially a man; a playing card with a picture of a male servant
Example
The knave tried to cheat the old woman out of her savings.
那个无赖试图欺骗老妇人，以便从她的积蓄中偷走钱。
A2 noun /niː/

Knee

膝盖
Meaning
the joint connecting the thigh and the lower leg in humans
Example
He fell and scraped his knee on the pavement.
他摔倒并擦伤了膝盖在人行道上。
C1 noun /ˈnaɪt.hʊd/

knighthood

骑士身份
Meaning
The rank or dignity of a knight, or the ceremony of conferring knighthood.
Example
He was honored with knighthood for his contributions to science.
由于他对科学的贡献，他被授予骑士身份。
C2 noun /ˈnɪk.næk/

knickknack

幸福
Meaning
A small decorative object, especially in a house.
Example
The shelf was full of little knickknacks collected from their travels.
当她收到奖项时，她无法隐藏自己的幸福。
C1 noun

Kin

家庭; 亲戚;
B2 noun /ˈkiː.pər/

Keeper

守卫者; 看护人;
Meaning
a person whose job it is to guard or take care of something or someone; a goalkeeper
Example
The zoo keeper fed the animals every morning at eight o'clock.
动物园管理员每天早上八点喂食动物。
C2 noun /ˌklɛptəˈmeɪniæk/

kleptomaniac

有不可抗拒的偷窃冲动的人
Meaning
A person with an irresistible urge to steal, typically without need or profit.
Example
The kleptomaniac was caught shoplifting again.
这个窃盗狂又一次在商店偷东西时被抓住了。
A2 adjective /kəˈriːən/

korean

韩国的
Meaning
relating to Korea, its people, language, or culture
Example
We went to a Korean restaurant for dinner.
我们去了一个韩国餐厅吃晚餐。
A2 noun /nɒk/

Knock

敲击; 叩响
Meaning
a sudden sharp blow; the sound of striking something
Example
There was a loud knock at the door late at night.
深夜时，门外传来了一声响亮的敲击声。
B1 noun /ˈkɪlər/

killer

杀手
Meaning
A person or thing that kills.
Example
The police caught the killer last night.
警察昨晚抓住了杀手。
C2 noun /kəˈdʌm.bə/

Kadamba

卡丹巴树
Meaning
A tropical tree with round, fragrant orange flowers, sacred in Hindu culture and associated with Lord Krishna
Example
The kadamba tree is mentioned frequently in ancient Indian poetry.
卡丹巴树在古印度诗歌中经常被提及。
B1 noun /kɪk/

Kick

踢; 用脚踢
Meaning
a blow or forceful thrust with the foot; a sudden strong feeling of excitement
Example
The soccer player scored a goal with a powerful kick from outside the penalty area.
足球运动员在禁区外用力踢出了一个进球。
A2 noun /ˈket.əl/

Kettle

水壶
Meaning
a container used for boiling water, typically with a lid, spout, and handle
Example
The electric kettle whistled when the water reached boiling point.
电水壶在水达到沸点时发出了哨声。
A2 verb /kɪs/

Kiss

吻
Meaning
to touch with the lips as a sign of affection
Example
The mother kissed her baby goodnight.
母亲吻了她的宝宝，晚安。
C2 noun /ˌkiː.təʊˈdʒen.ɪ.sɪs/

ketogenesis

酮体生成过程
Meaning
The metabolic process by which the liver produces ketones from fatty acids, providing an alternative energy source during low carbohydrate availability.
Example
Ketogenesis occurs during fasting or low-carb diets.
酮生成发生在禁食或低碳水化合物饮食时。
C1 adjective /kɪˈnɛtɪk/

kinetic

动能
Meaning
Relating to or resulting from motion.
Example
Kinetic energy increases as the object moves faster.
随着物体移动得更快，动能增加。
B2 adjective /ˈnoʊ.ɪŋ/

Knowing

知道; 敏锐; 狡猾;
Meaning
showing awareness or understanding; perceptive; shrewd
Example
She gave him a knowing smile when he mentioned the secret.
她提到秘密时，给了他一个会心的微笑。
C1 noun /næk/

knack

天赋
Meaning
a natural skill or ability; a special talent for doing something easily
Example
She has a knack for making people feel comfortable.
她有一种让人们感到舒适的天赋。
C2 noun /noʊl koʊl/

Knol khol

球茎甘蓝
Meaning
round bulbous vegetable from cabbage family with pale green color and mild taste
Example
Knol khol can be eaten raw in salads or cooked in curries.
球茎甘蓝可以生吃做沙拉，也可以做成咖喱菜肴。
C2 noun /ˈkɜːrtʃɪf/

kerchief

头巾
Meaning
a piece of cloth worn around the head or neck
Example
She wore a red kerchief on her head.
她头上戴着一条红色的头巾。
C2 noun /ˈkɪŋʃɪp/

kingship

王权
Meaning
The position, dignity, or authority of a king.
Example
The king’s advisors often reminded him of the responsibilities of kingship.
国王的顾问们经常提醒他王权的责任。
C1 verb /ˈkɪndəl/

kindle

点燃
Meaning
to light a fire; to arouse or inspire
Example
She kindled the campfire with dry wood.
她用干木柴点燃了篝火。
A2 noun /ˈkiːbɔːrd/

keyboard

键盘
Meaning
a set of keys used to operate a computer, typewriter, or similar device for inputting text and commands
Example
She typed the report quickly on her keyboard.
她在键盘上快速打完了报告。
C1 verb /niːd/

knead

揉捏
Meaning
to work dough or clay into a uniform mixture by pressing, folding, and stretching
Example
She kneads the dough until it becomes smooth.
她把面团揉到光滑为止。
C2 noun /nɛl/

knell

丧钟
Meaning
The sound of a bell, especially when rung solemnly for a death or funeral; a signal of the end or failure of something.
Example
The knell of the church bell echoed through the valley at dusk.
教堂的丧钟在黄昏时分回荡在山谷中。
B1 adjective /kiːn/

Keen

敏锐的; 强烈的; 渴望的
Meaning
sharp; acute; intense; eager
Example
She has a keen interest in science.
她对科学有浓厚的兴趣。
C2 noun /kɪθ/

kith

亲友
Meaning
Friends, acquaintances, and relations.
Example
He invited all his kith and kin to the wedding.
他邀请了所有的亲友参加婚礼。
C2 noun /ˈkɪldʒɔɪ/

killjoy

扫兴的人
Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
别在派对上当扫兴的人。
A1 noun /kiː/

Key

钥匙
Meaning
a small piece of shaped metal used to operate a lock; something that provides a means of access
Example
She lost her house key and couldn't get inside until the locksmith arrived.
她丢失了她的房子钥匙，直到锁匠到来之前无法进入。
B1 noun

Kindness

善良; 仁慈; 善意
C1 noun ˈkiː.stəʊn ˈspiː.ʃiːz

keystone species

基石物种
Meaning
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Example
Wolves are a keystone species that regulate prey populations.
狼是调节猎物种群的基石物种。
C1 noun /kəˈlaɪdəˌskoʊp/

kaleidoscope

万花筒
Meaning
A toy or instrument with mirrors and colored pieces that create changing patterns when rotated; also used metaphorically for a constantly changing sequence of patterns or elements.
Example
The city lights turned into a kaleidoscope of colors as the festival began.
当节日开始时，城市的灯光变成了色彩斑斓的万花筒。
C2 noun /ˈkɪləˌliːtər/

kiloliter

千升
Meaning
a unit of capacity equal to 1,000 liters
Example
The tank can hold up to three kiloliters of water.
水箱最多可容纳三千升水。
B1 noun /ˈkiː.wi/

Kiwi

奇异果
Meaning
a small brown fruit with green flesh and black seeds; a flightless bird from New Zealand
Example
I love eating fresh kiwi for breakfast.
我喜欢早餐吃新鲜的奇异果。
C1 noun /ˈkɪləˌwɒt/

kilowatt

千瓦
Meaning
a unit of power equal to 1,000 watts
Example
The generator produces ten kilowatts of electricity.
发电机产生十千瓦的电力。
C2 noun /ˈkɪzmɛt/

kismet

命运
Meaning
Destiny or fate.
Example
Meeting her on that day felt like pure kismet.
那天遇见她感觉就像纯粹的命运。
A1 adjective /kaɪnd/

Kind

友善的；有同情心的
Meaning
gentle; caring; compassionate; showing sympathy
Example
He is a kind person who always helps others.
他是一个友善的人，总是帮助别人。
C1 noun, adjective /ˈkɪndrəd/

kindred

幸福
Meaning
A person's relatives or family; similar in nature or character.
Example
They discovered kindred spirits in each other.
当她收到奖项时，她无法掩饰自己的幸福。
C2 noun /kəˈbɑːdi/

kabadi

废品收购者
Meaning
a person who collects and sells scrap or recyclable materials, especially in South Asia
Example
The kabadi came every week to collect old newspapers and bottles.
废品收购者来收集旧物品。
C2 noun /ˈneɪvəri/

knavery

欺诈
Meaning
dishonest or deceitful behavior; trickery
Example
The politician’s knavery was exposed by the media.
政治家的欺诈被媒体揭露了。
C1 noun /nɒb/

Knob

门或抽屉上的圆形把手; 机器上的小圆形开关
Meaning
a rounded handle on a door or drawer; a small rounded switch on a machine
Example
He turned the brass knob to open the old wooden door.
他转动铜制的门把手，打开了那扇旧木门。
B2 verb /niːl/

kneel

下跪
Meaning
to go down on one's knees; to rest on the knees
Example
The knight knelt before the king.
骑士在国王面前跪下。
C1 adverb /ˈnoʊɪŋli/

knowingly

故意
Meaning
in a way that shows you are aware of something; intentionally
Example
She knowingly kept the secret from her friends.
她故意对朋友们保守了秘密。
B1 noun /kɪˈlɒmɪtər/ or /ˈkɪləˌmiːtər/

kilometer

千米
Meaning
a unit of length equal to 1,000 meters
Example
The village is about five kilometers away from the town.
这个村庄离城镇大约五千米远。
C2 adjective /ˈkɪŋ.ki/

Kinky

不寻常的性行为；卷曲或弯曲的头发
Meaning
having or involving unconventional sexual practices; having tight curls or bends
Example
His kinky hair made him look unique.
他的卷发使他看起来独特。
B1 noun /naɪt/

Knight

骑士; 中世纪战士
Meaning
a man given a rank of honor by a British king or queen; a medieval warrior on horseback
Example
The brave knight rescued the princess from the dragon's castle.
勇敢的骑士从龙的城堡救出了公主。
B2 noun /ˈker.ə.siːn/

Kerosene

煤油
Meaning
a combustible hydrocarbon liquid widely used as a fuel in lamps and heating systems
Example
The old lamp burned kerosene to provide light during power outages.
老式的灯燃烧煤油以在停电时提供光源。
A2 noun /naɪf/

Knife

刀
Meaning
a cutting instrument with a sharp blade
Example
She used a sharp knife to cut the vegetables for dinner.
她用一把锋利的刀切菜做晚餐。
B2 adjective /ˈnɑː.lɪ.dʒə.bəl/

Knowledgeable

博学的; 知识丰富的; 有教养的
Meaning
having extensive knowledge; well-informed; educated
Example
She is very knowledgeable about ancient history.
她对古代历史非常了解。
C2 verb /ˌkaʊˈtaʊ/

kowtow

过度顺从
Meaning
To act in an excessively subservient or obedient manner.
Example
He refused to kowtow to the unreasonable demands.
他拒绝顺从不合理的要求。
C1 noun /ˈken.əl/

Kennel

狗舍; 养犬或寄养犬的场所
Meaning
a small shelter for a dog; an establishment for the breeding or boarding of dogs
Example
The dog slept comfortably in his wooden kennel in the backyard.
狗狗在后院的木狗舍里舒适地睡着了。
A2 verb /kɪl/

kill

杀死
Meaning
to cause the death of; to end life
Example
The hunter killed the deer.
猎人杀死了鹿。
A2 noun /ˌkæŋ.ɡəˈruː/

Kangaroo

袋鼠
Meaning
a large marsupial from Australia that moves by hopping on its strong hind legs
Example
The kangaroo jumped high with its joey in its pouch.
袋鼠跳得很高，带着它的小袋鼠。
B2 noun

Kitchen garden

厨房花园; 厨房旁边的花园
A2 verb /kɪd/

kid

开玩笑
Meaning
to joke or tease; to speak in a playful manner
Example
I'm just kidding with you.
我只是在开玩笑。
B1 noun /kɪt/

kit

工具包
Meaning
a set of tools, equipment, or materials used for a particular purpose
Example
He bought a first aid kit for emergencies.
他买了一个急救包以备不时之需。
C2 noun /ˈkedʒ.ə.riː/

Kedgeree

凯吉瑞
Meaning
a European dish of cooked rice, fish, and hard-boiled eggs, originally from India
Example
The breakfast menu featured traditional kedgeree with smoked haddock and eggs.
早餐菜单上有传统的凯吉瑞，配有烟熏鳕鱼和鸡蛋。
C2 noun /kəˈrɒn.də/

Karonda

卡龙达果
Meaning
a small dark purple berry-like fruit that is sour and used in pickles
Example
Karonda is often used to make pickles and preserves.
卡龙达常用于制作腌菜和果酱。
A2 noun /kɪŋ/

King

国王
Meaning
the male ruler of an independent state, especially one who inherits the position by right of birth
Example
The king ruled the country with wisdom and fairness.
国王以智慧和公正治理国家。
C1 noun /kɪˈməʊnoʊ/

kimono

和服
Meaning
a traditional Japanese robe with wide sleeves, tied with a sash
Example
She wore a beautiful silk kimono at the ceremony.
她在仪式上穿着一件美丽的丝绸和服。
A2 noun /ˈkɪt.ən/

Kitten

小猫
Meaning
a young cat
Example
The little kitten loves to play with yarn balls.
小猫喜欢玩线球。
C2 adjective /ˈnɒti/

knotty

复杂
Meaning
Complicated, difficult to solve or full of knots.
Example
He faced a knotty legal issue.
他面临一个复杂的法律问题。
A1 noun /ˈkɪtʃən/

Kitchen

厨房
Meaning
a room or area where food is prepared and cooked
Example
The kitchen was filled with the smell of fresh bread.
厨房里充满了新鲜面包的香味。
C1 noun /ˈkɪŋ.fɪʃ.ər/

King-Fisher

翠鸟
Meaning
a small bird with bright blue and orange feathers that catches fish by diving into water
Example
The colorful kingfisher dove into the pond to catch a fish.
五彩斑斓的翠鸟潜入池塘抓鱼。
C1 noun /ˈkuːdɒs/

kudos

赞扬
Meaning
Praise and honor received for an achievement.
Example
She received kudos for her excellent performance.
她因出色的表现获得了赞扬。
B2 verb /ˈkɪdnæp/

kidnap

绑架
Meaning
to take someone away illegally by force
Example
The criminals kidnapped the wealthy businessman.
罪犯绑架了富有的商人。
B1 noun; gerund /ˈnɪtɪŋ/

knitting

编织
Meaning
the craft or activity of making fabric by interlocking loops of yarn with needles; the act of forming something closely or firmly together
Example
She spends her evenings knitting scarves for her family.
她晚上为家人编织围巾。
C2 adjective /ˈnaɪt.li/

Knightly

骑士般的; 高贵和勇敢
Meaning
having the characteristics of a knight; chivalrous; noble and brave
Example
He showed knightly courage in defending the innocent.
他在保护无辜时展现了骑士般的勇气。
A1 noun /kiːp/

Keep

生计; 城堡的最强部分
Meaning
food and other things necessary for living; the strongest part of a castle
Example
He worked hard to earn his keep and support his family.
他努力工作以谋生并支持他的家人。
B2 verb /nɪt/

knit

编织
Meaning
To make clothes or fabric by interlocking loops of yarn with needles.
Example
She loves to knit scarves for her friends during the winter.
她喜欢在冬天为她的朋友编织围巾。
B1 noun /ˈkɪŋdəm/

Kingdom

王国
Meaning
a country or territory ruled by a king or queen
Example
The kingdom was known for its rich culture and traditions.
这个王国以其丰富的文化和传统而闻名。
B1 adverb; adjective /ˈkaɪndli/

kindly

亲切地
Meaning
in a kind or gentle manner; showing kindness or goodwill
Example
She kindly helped the old man cross the street.
她亲切地帮助老人过马路。
A1 verb /noʊ/

know

知道
Meaning
to have information about something; to be familiar with
Example
I know the answer to this question.
我知道这个问题的答案。
B1 noun /ˈkɪləɡræm/

kilogram

千克
Meaning
the base unit of mass in the metric system equal to 1,000 grams
Example
The bag of rice weighs five kilograms.
这袋米重五千克。
A2 noun /ˈkɪndərˌɡɑːrtn/

kindergarten

幼儿园
Meaning
a school or class for young children, typically between the ages of four and six
Example
She enrolled her child in kindergarten to prepare for elementary school.
她把孩子注册进了幼儿园，为小学做准备。
B2 noun /nɒt/

Knot

结
Meaning
a fastening made by tying a piece of string, rope, or something similar; a hard mass in wood
Example
The sailor tied a secure knot to anchor the boat safely.
水手系了一个稳固的结，以安全地将船锚定。
C1 noun /ˈkærət/

karat

克拉
Meaning
A unit for measuring the purity of gold, with 24 karats being pure gold.
Example
The ring was made of 18-karat gold.
戒指是由18克拉黄金制成的。
C2 noun

Kinsfolk

家族, 亲戚
C2 noun /noʊl/

Knoll

小山丘；土堆
Meaning
a small rounded hill or mound
Example
The old oak tree stood majestically on top of the grassy knoll.
那棵老橡树雄伟地站在覆盖着草的小山丘上。
C2 noun /kɛn/

ken

知识范围
Meaning
one's range of knowledge or understanding
Example
Quantum physics is beyond my ken.
量子物理学超出了我的理解范围。
C1 adjective /ˈnæk.ərd/

Knackered

极其疲惫; 累坏了
Meaning
extremely tired; exhausted
Example
I'm absolutely knackered after working all day.
我工作了一整天，现在完全累坏了。
C2 noun /ˈkɪŋɡlɪŋ/

kingling

小国王
Meaning
A minor or petty king; a ruler of small importance.
Example
The kingling demanded respect from his people despite his small realm.
那个小国王尽管有一个小王国，但他要求人民尊敬他。
B2 noun /ˈkɪlɪŋ/

killing

谋杀
Meaning
the act of causing death, especially deliberately
Example
The movie depicts the brutal killing of the villagers.
电影描绘了村民的残忍谋杀。
A2 noun /ˈketʃ.ʌp/

Ketch-up

番茄酱
Meaning
a thick sauce made chiefly from tomatoes, vinegar, and spices
Example
She squeezed some ketchup on her french fries before eating them.
她在吃薯条前挤了一些番茄酱。