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B1 noun /kɪˈlɒmɪtər/ or /ˈkɪləˌmiːtər/

kilometer

kilómetro
Meaning
a unit of length equal to 1,000 meters
Example
The village is about five kilometers away from the town.
El pueblo está a unos cinco kilómetros de la ciudad.
A2 noun /ˌkæŋ.ɡəˈruː/

Kangaroo

canguro
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.
El canguro saltó alto con su cría en su bolsa.
B1 noun /ˈkɪləɡræm/

kilogram

kilogramo
Meaning
the base unit of mass in the metric system equal to 1,000 grams
Example
The bag of rice weighs five kilograms.
La bolsa de arroz pesa cinco kilogramos.
C2 noun /ˈkɪzmɛt/

kismet

destino
Meaning
Destiny or fate.
Example
Meeting her on that day felt like pure kismet.
Encontrarla ese día fue como puro destino.
A2 noun /ˈket.əl/

Kettle

tetera
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.
La tetera eléctrica silbó cuando el agua alcanzó el punto de ebullición.
C1 noun /ˈken.əl/

Kennel

caseta para perros; establecimiento para la cría o alojamiento de perros
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.
El perro durmió cómodamente en su perrera de madera en el patio trasero.
B2 adjective /ˈnɑː.lɪ.dʒə.bəl/

Knowledgeable

sabio; informado; educado
Meaning
having extensive knowledge; well-informed; educated
Example
She is very knowledgeable about ancient history.
Ella es muy sabia sobre la historia antigua.
A2 noun /nɒk/

Knock

golpe; toquido
Meaning
a sudden sharp blow; the sound of striking something
Example
There was a loud knock at the door late at night.
Hubo un fuerte golpe en la puerta a medianoche.
B1 noun; gerund /ˈnɪtɪŋ/

knitting

tejer
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.
Ella pasa las tardes tejiendo bufandas para su familia.
C1 noun /næk/

knack

habilidad
Meaning
a natural skill or ability; a special talent for doing something easily
Example
She has a knack for making people feel comfortable.
Ella tiene una habilidad para hacer que las personas se sientan cómodas.
A2 noun /naɪf/

Knife

cuchillo
Meaning
a cutting instrument with a sharp blade
Example
She used a sharp knife to cut the vegetables for dinner.
Ella usó un cuchillo afilado para cortar las verduras para la cena.
A1 noun /ˈkɪtʃən/

Kitchen

cocina
Meaning
a room or area where food is prepared and cooked
Example
The kitchen was filled with the smell of fresh bread.
La cocina estaba llena con el olor de pan fresco.
C1 noun ˈkiː.stəʊn ˈspiː.ʃiːz

keystone species

especie clave
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.
Los lobos son una especie clave que regula las poblaciones de presas.
B2 adjective /ˈnoʊ.ɪŋ/

Knowing

conocimiento; perceptivo; astuto;
Meaning
showing awareness or understanding; perceptive; shrewd
Example
She gave him a knowing smile when he mentioned the secret.
Ella le dio una sonrisa comprensiva cuando mencionó el secreto.
A2 noun /kɪŋ/

King

rey
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.
El rey gobernó el país con sabiduría y justicia.
B2 noun /ˈkɪlɪŋ/

killing

asesinato
Meaning
the act of causing death, especially deliberately
Example
The movie depicts the brutal killing of the villagers.
La película muestra el brutal asesinato de los aldeanos.
C2 noun /ˈnɪk.næk/

knickknack

felicidad
Meaning
A small decorative object, especially in a house.
Example
The shelf was full of little knickknacks collected from their travels.
No pudo ocultar su felicidad cuando recibió el premio.
B2 noun /ˈkiːɒsk/

kiosk

quiosco
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.
Compró una botella de agua en el quiosco cerca de la estación.
C2 noun /kɛn/

ken

conocimiento
Meaning
one's range of knowledge or understanding
Example
Quantum physics is beyond my ken.
La física cuántica está más allá de mi conocimiento.
C1 noun /kəˈlaɪdəˌskoʊp/

kaleidoscope

caleidoscopio
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.
Las luces de la ciudad se convirtieron en un caleidoscopio de colores cuando comenzó el festival.
C1 adjective /ˈnæk.ərd/

Knackered

extremadamente cansado; agotado
Meaning
extremely tired; exhausted
Example
I'm absolutely knackered after working all day.
Estoy completamente agotado después de trabajar todo el día.
C2 noun /kəˈrɒn.də/

Karonda

karonda
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.
La karonda se usa a menudo para hacer encurtidos y conservas.
A2 adjective /kəˈriːən/

korean

coreano
Meaning
relating to Korea, its people, language, or culture
Example
We went to a Korean restaurant for dinner.
Fuimos a un restaurante coreano para cenar.
B1 noun /ˈkɪlər/

killer

asesino
Meaning
A person or thing that kills.
Example
The police caught the killer last night.
La policía atrapó al asesino anoche.
B2 noun /nɒt/

Knot

nudo
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.
El marinero ató un nudo seguro para anclar el barco de manera segura.
A2 noun /kaɪt/

Kite

buitre
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.
El cometa voló alto sobre los campos buscando presas.
B1 noun /ˈkiː.wi/

Kiwi

kiwi
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.
Me encanta comer kiwi fresco para el desayuno.
C1 noun

Kin

familia; parientes;
A2 noun /ˈnɒl.ɪdʒ/

knowledge

conocimiento
Meaning
Facts, information, and skills acquired through experience or education.
Example
Knowledge of the universe is expanding through research.
El conocimiento del universo está expandiéndose a través de la investigación.
C1 verb /niːd/

knead

amasar
Meaning
to work dough or clay into a uniform mixture by pressing, folding, and stretching
Example
She kneads the dough until it becomes smooth.
Ella amasa la masa hasta que se vuelve suave.
C1 noun /ˈnaɪt.hʊd/

knighthood

caballerosidad
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.
Fue honrado con la caballerosidad por sus contribuciones a la ciencia.
B2 verb /ˈkɪdnæp/

kidnap

secuestrar
Meaning
to take someone away illegally by force
Example
The criminals kidnapped the wealthy businessman.
Los criminales secuestraron al rico empresario.
C2 noun /ˈkɪldʒɔɪ/

killjoy

aguafiestas
Meaning
a person who spoils the fun or enjoyment of others
Example
Don’t be a killjoy at the party.
No seas un aguafiestas en la fiesta.
A2 noun /ˈkɪt.ən/

Kitten

gatito
Meaning
a young cat
Example
The little kitten loves to play with yarn balls.
El pequeño gatito le encanta jugar con bolas de hilo.
B2 verb /niːl/

kneel

arrodillarse
Meaning
to go down on one's knees; to rest on the knees
Example
The knight knelt before the king.
El caballero se arrodilló ante el rey.
A2 verb /kɪl/

kill

matar
Meaning
to cause the death of; to end life
Example
The hunter killed the deer.
El cazador mató al ciervo.
A2 verb /kɪd/

kid

bromear
Meaning
to joke or tease; to speak in a playful manner
Example
I'm just kidding with you.
Solo estoy bromeando contigo.
A1 adjective /kaɪnd/

Kind

amable; compasivo
Meaning
gentle; caring; compassionate; showing sympathy
Example
He is a kind person who always helps others.
Él es una persona amable que siempre ayuda a los demás.
C2 noun /kəˈdʌm.bə/

Kadamba

árbol kadamba
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.
El árbol kadamba se menciona con frecuencia en la poesía india antigua.
A1 noun /kiː/

Key

llave
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.
Ella perdió su llave de casa y no pudo entrar hasta que llegó el cerrajero.
C2 noun /ˌklɛptəˈmeɪniæk/

kleptomaniac

persona con el impulso irresistible de robar
Meaning
A person with an irresistible urge to steal, typically without need or profit.
Example
The kleptomaniac was caught shoplifting again.
El kleptómano fue atrapado robando en una tienda nuevamente.
C2 noun /noʊl/

Knoll

colina pequeña; montículo
Meaning
a small rounded hill or mound
Example
The old oak tree stood majestically on top of the grassy knoll.
El viejo roble se erguía majestuosamente sobre la pequeña colina cubierta de hierba.
C2 noun /kɪθ/

kith

amigos
Meaning
Friends, acquaintances, and relations.
Example
He invited all his kith and kin to the wedding.
Invitó a todos sus amigos y familiares a la boda.
B2 noun /ˈkɪdni/

Kidney

riñón
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.
Beber suficiente agua ayuda a mantener los riñones saludables.
C1 noun, adjective /ˈkɪndrəd/

kindred

felicidad
Meaning
A person's relatives or family; similar in nature or character.
Example
They discovered kindred spirits in each other.
No pudo esconder su felicidad cuando recibió el premio.
C1 noun /nɒb/

Knob

un mango redondeado en una puerta o cajón; un interruptor redondeado pequeño en una máquina
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.
Giró el pomo de latón para abrir la puerta de madera vieja.
C1 noun /ˈkærət/

karat

quilate
Meaning
A unit for measuring the purity of gold, with 24 karats being pure gold.
Example
The ring was made of 18-karat gold.
El anillo estaba hecho de oro de 18 quilates.
A2 noun /ˈkɪndərˌɡɑːrtn/

kindergarten

jardín de infantes
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.
Inscribió a su hijo en el jardín de infantes para prepararse para la escuela primaria.
A2 adjective /noʊn/

known

conocido
Meaning
recognized or familiar; something that is identified or acknowledged
Example
He is a well-known actor in the country.
Él es un actor bien conocido en el país.
B1 noun

Kindness

bondad; amabilidad; generosidad
A2 verb /kɪs/

Kiss

besar
Meaning
to touch with the lips as a sign of affection
Example
The mother kissed her baby goodnight.
La madre besó a su bebé buenas noches.
B1 noun /kɪt/

kit

conjunto de herramientas
Meaning
a set of tools, equipment, or materials used for a particular purpose
Example
He bought a first aid kit for emergencies.
Compró un botiquín de primeros auxilios para emergencias.
C2 adjective /ˈnaɪt.li/

Knightly

caballeroso; de caballero; noble y valiente
Meaning
having the characteristics of a knight; chivalrous; noble and brave
Example
He showed knightly courage in defending the innocent.
Él mostró coraje caballeroso al defender a los inocentes.
C1 noun /ˈkuːdɒs/

kudos

elogio
Meaning
Praise and honor received for an achievement.
Example
She received kudos for her excellent performance.
Ella recibió elogios por su excelente desempeño.
C2 noun /ˈneɪvəri/

knavery

engaño
Meaning
dishonest or deceitful behavior; trickery
Example
The politician’s knavery was exposed by the media.
La engaño del político fue expuesto por los medios.
C2 noun /ˈkɜːrtʃɪf/

kerchief

pañuelo
Meaning
a piece of cloth worn around the head or neck
Example
She wore a red kerchief on her head.
Ella llevaba un pañuelo rojo en la cabeza.
C1 verb /ˈkɪndəl/

kindle

encender
Meaning
to light a fire; to arouse or inspire
Example
She kindled the campfire with dry wood.
Ella encendió la fogata con madera seca.
A2 noun /niː/

Knee

rodilla
Meaning
the joint connecting the thigh and the lower leg in humans
Example
He fell and scraped his knee on the pavement.
Se cayó y se raspó la rodilla en la acera.
C2 noun /nɛl/

knell

campanazo
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.
El campanazo de la iglesia resonó por el valle al atardecer.
A2 noun /ˈkiːbɔːrd/

keyboard

teclado
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.
Ella escribió el informe rápidamente en el teclado.
C2 verb /ˌkaʊˈtaʊ/

kowtow

actuar de manera excesivamente sumisa
Meaning
To act in an excessively subservient or obedient manner.
Example
He refused to kowtow to the unreasonable demands.
Se negó a ceder a las demandas irracionales.
B1 adverb; adjective /ˈkaɪndli/

kindly

amablemente
Meaning
in a kind or gentle manner; showing kindness or goodwill
Example
She kindly helped the old man cross the street.
Ella ayudó amablemente al anciano a cruzar la calle.
C2 noun /ˈkedʒ.ə.riː/

Kedgeree

kedgeree
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.
El menú del desayuno presentaba kedgeree tradicional con haddock ahumado y huevos.
C1 noun /ˈkɪŋ.fɪʃ.ər/

King-Fisher

martinete
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.
El colorido martinete se zambulló en el estanque para atrapar un pez.
C1 adjective /kɪˈnɛtɪk/

kinetic

cinético
Meaning
Relating to or resulting from motion.
Example
Kinetic energy increases as the object moves faster.
La energía cinética aumenta a medida que el objeto se mueve más rápido.
C1 noun /ˈkɜːrnəl/

kernel

el núcleo de algo; la parte comestible de una nuez o semilla
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.
El núcleo del argumento era sobre la equidad.
B1 noun /kɪk/

Kick

patada; golpe con el pie
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.
El jugador de fútbol anotó un gol con una patada poderosa desde fuera del área de penalti.
C1 adverb /ˈnoʊɪŋli/

knowingly

conscientemente
Meaning
in a way that shows you are aware of something; intentionally
Example
She knowingly kept the secret from her friends.
Ella conscientemente guardó el secreto de sus amigos.
C2 noun /ˈkɪŋɡlɪŋ/

kingling

rey pequeño
Meaning
A minor or petty king; a ruler of small importance.
Example
The kingling demanded respect from his people despite his small realm.
El rey pequeño demandó respeto de su gente a pesar de su pequeño reino.
C2 noun /kɪln/

kiln

horno de cerámica
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.
El alfarero colocó las macetas de arcilla en el horno de cerámica para cocerlas.
B1 adjective /kiːn/

Keen

agudo; intenso; ansioso
Meaning
sharp; acute; intense; eager
Example
She has a keen interest in science.
Ella tiene un gran interés en la ciencia.
C2 noun /ˈkɪləˌliːtər/

kiloliter

kilolitro
Meaning
a unit of capacity equal to 1,000 liters
Example
The tank can hold up to three kiloliters of water.
El tanque puede contener hasta tres kilolitros de agua.
B2 noun /ˈker.ə.siːn/

Kerosene

queroseno
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.
La vieja lámpara quemaba queroseno para proporcionar luz durante los cortes de energía.
C2 noun /kəˈbɑːdi/

kabadi

chatarrero
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.
El chatarrero recoge materiales viejos para reciclar.
C2 noun /ˈkɪŋʃɪp/

kingship

realeza
Meaning
The position, dignity, or authority of a king.
Example
The king’s advisors often reminded him of the responsibilities of kingship.
Los consejeros del rey a menudo le recordaban las responsabilidades de la realeza.
C2 noun /neɪv/

Knave

persona deshonesta; un hombre en una carta de juego
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.
El canalla intentó engañar a la anciana para robarle sus ahorros.
A1 noun /kiːp/

Keep

sustento; la parte más fuerte de un castillo
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.
Trabajó duro para ganarse el sustento y apoyar a su familia.
A2 noun /ˈketʃ.ʌp/

Ketch-up

salsa de tomate
Meaning
a thick sauce made chiefly from tomatoes, vinegar, and spices
Example
She squeezed some ketchup on her french fries before eating them.
Ella puso un poco de salsa de tomate en sus papas fritas antes de comerlas.
C1 noun /ˈkɪləˌwɒt/

kilowatt

kilovatio
Meaning
a unit of power equal to 1,000 watts
Example
The generator produces ten kilowatts of electricity.
El generador produce diez kilovatios de electricidad.
B2 adjective /ˌkaɪnd ˈhɑːrtɪd/

kind-hearted

amable
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.
Es conocida como una maestra amable que siempre ayuda a sus estudiantes.
C2 adjective /ˈkɪŋ.ki/

Kinky

prácticas sexuales no convencionales; cabello rizado o en espiral
Meaning
having or involving unconventional sexual practices; having tight curls or bends
Example
His kinky hair made him look unique.
Su cabello rizado lo hizo ver único.
B2 noun

Kitchen garden

huerto doméstico; jardín cerca de la cocina
C2 noun /noʊl koʊl/

Knol khol

col de bolita
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.
El col de bolita se puede comer crudo en ensaladas o cocinado en curris.
B2 noun /ˈkiː.pər/

Keeper

guardián; cuidador;
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.
El cuidador del zoológico alimentaba a los animales todas las mañanas a las ocho en punto.
B1 noun /naɪt/

Knight

caballero; caballero medieval
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.
El valiente caballero rescató a la princesa del castillo del dragón.
C2 noun /ˌkiː.təʊˈdʒen.ɪ.sɪs/

ketogenesis

proceso de producción de cetonas
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.
La cetogénesis ocurre durante el ayuno o dietas bajas en carbohidratos.
C2 adjective /ˈnɒti/

knotty

complicado
Meaning
Complicated, difficult to solve or full of knots.
Example
He faced a knotty legal issue.
Él enfrentó un complicado problema legal.
B2 verb /nɪt/

knit

tejer
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.
A ella le encanta tejer bufandas para sus amigos durante el invierno.
B1 noun /ˈkɪŋdəm/

Kingdom

reino
Meaning
a country or territory ruled by a king or queen
Example
The kingdom was known for its rich culture and traditions.
El reino era conocido por su rica cultura y tradiciones.
C1 noun /kɪˈməʊnoʊ/

kimono

kimono
Meaning
a traditional Japanese robe with wide sleeves, tied with a sash
Example
She wore a beautiful silk kimono at the ceremony.
Ella llevaba un hermoso kimono de seda en la ceremonia.
C2 noun

Kinsfolk

familia, parientes
C1 noun /ˈkiːpˌseɪk/

keepsake

recuerdo
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.
Ella me dio un pequeño medallón como recuerdo de nuestra amistad.
A1 verb /noʊ/

know

saber
Meaning
to have information about something; to be familiar with
Example
I know the answer to this question.
Yo sé la respuesta a esta pregunta.