Kafkaesque

(adj.) marked by a senseless, disorienting, often menacing complexity

Kaftan

(n.) a long garment having long sleeves and tied at the waist by a girdle

Kamikaze

(n.) a person or thing that behaves in a wildly reckless or destructive manner

Kangaroo

(n.) a herbivorous marsupial that has a small head, short forelimbs, powerful hind legs used for leaping, and a long, thick tail

Karate

(n.) a sport based on the Japanese method of self-defense

Kashmir

(n.) the fine, downy wool at the roots of the hair of the Kashmir goat

Kazoo

(n.) a musical toy consisting of a tube that is open at both ends and has a hole on the side covered with parchment or membrane

Kebab

(n.) roast meat, often skewered

Keel

(n.) a ship or boat

Keen

(adj.) finely sharpened, as an edge; eager, enthusiastic

Keepsake

(n.) anything kept, or given to be kept, as a token of friendship or affection

Keg

(n.) a cask or a barrel

Kegling

(n.) the sport of bowling

Kelpie

(n.) a water spirit in Scottish legends, usually having the form of a horse, reputed to cause drownings

Kennel

(n.) a house or shelter for a dog or cat

Keratic

(adj.) horny

Kernel

(n.) the body of a seed within its husk or integuments

Kerosene

(n.) a fuel and cleaning solvent

Kerplunk

(adj.) with or as if with a sudden muffled thud

Ketchup

(n.) a condiment consisting of pureed tomatoes

Kettle

(n.) a metal container used to boil liquids

Keynote

(n.) the main idea or central principle of a speech

Khaki

(n.) dull yellowish brown

Kibosh

(n.) nonsense

Kidnap

(v.) to abduct by force or fraud

Killjoy

(n.) a person who spoils the joy or pleasure of others

Kiln

(n.) an oven used for burning or baking something

Kilogram

(n.) a unit of measurement with 1,000 grams

Kilt

(n.) a short, pleated skirt

Kilter

(n.) good condition

Kimchi

(n.) in Korean cuisine, fermented or pickled cabbage

Kindle

(v.) to start (a fire)

Kindred

(n.) a group of persons related to each other

Kinetic

(adj.) pertaining to movement

Kinfolk

(n.) relatives

Kinglet

(n.) a king ruling over a small country or territory

Kingpin

(n.) a person of chief importance in a movement or corporation

Kink

(n.) a twist or curl

Kiosk

(n.) a small structure with one or more open sides

Kismet

(n.) fate

Kitsch

(n.) something of tawdry design, appearance, or content created to appeal to popular or undiscriminating taste

Kite

(n.) a light frame covered in thin material that flies in the wind

Kith

(n.) friends, neighbors, or acquaintances

Kiwi

(n.) a fruit with a brown skin and a green inside

Kleptomania

(n.) an irresistible impulse to steal

Klutz

(n.) a clumsy, awkward person

Knackered

(adj.) exhausted

Knap

(n.) the summit of a small hill

Knavish

(adj.) dishonest or untrustworthy

Knell

(n.) the sound made by a bell rung slowly

Knucklehead

(n.) a stupid, bumbling, inept person

Knurl

(n.) a small ridge or bead, especially one of a series, as on a button for decoration or on the edge of a thumbscrew to assist in obtaining a firm grip

Kohl

(n.) a powder used as a cosmetic to darken the eyelids

Kudo

(n.) honor or flory

Kumquat

(n.) a small, round or oblong fruit having a sweet rind and acid pulp