Knacks

Etymology
From.

Noun

 * 1) click, crack brief cracking sound
 * 2)  crack, cleft
 * 3)  minor (mental) flaw; quirk
 * 1)  minor (mental) flaw; quirk
 * 1)  minor (mental) flaw; quirk
 * 1)  minor (mental) flaw; quirk