köken: Probably from schnicken, variant of schnippen (“to flip one’s fingers”). The i-a-u ablaut is very common in German (and beyond); cf. tri-tra-trullala etc. Perhaps also influenced by Schnickschnack.
köken: Possibly from a dialect of Chinese 剪子、包袱、錘 /剪子、包袱、锤 (jiǎnzi, bāofu, chuí, “scissors, cloth wrapper, hammer”) and then became 包、剪、錘 /包、剪、锤 (bāo, jiǎn, chuí).