[klingen], imp. klang, p.p. geklungen, to sound, to ring.
klingeln, to ring.
Klirren, n. clash.
Klopfen, n. beating, knocking.
klopfen, to rap, to knock; es klopfte, there was a knock.
Kluft, f., pl. Klüfte, gap, cleft, gulf.
klug, smart, wise.
klügsten, wisest.
Knabe, m., pl. -n, boy.