Kost, f. food, board.
kostbar, costly, precious.
Kosten, pl. the costs.
kosten, to cost; koste es mir, even if it were to cost me.
Krachen, n. the cracking.
Kraft, f., pl. Kräfte, strength.
Kralle, f., pl. -n, claw.
krampfhaft, convulsively.
krank, sick, ill.
Kranken, sick people.