knikker

Etymology 1
From, from , which is.

Noun

 * 1) a marble toy
 * 2) various similarly shaped objects, including:
 * 3) a billiards ball
 * 4) certain seeds
 * 5)  a head, especially a bald skull (typically in kale knikker)
 * 6)  a lump or stone
 * 7)  (in the plural, absolutely used with definite article: de knikkers) The stakes of a game, deal etc.

Etymology 2

 * the root of knikken 'to nod' + -er

Noun

 * 1) A nodder