Where does “zāch” come from?

zāch (Middle High German) comes from Old High German zāhi, from Proto-West Germanic *tą̄h(ī), from Proto-Germanic tanhuz, from Proto-Indo-European denḱ- — to bite.

Ancestry of “zāch”, step by step

StepLanguageWordMeaning
1Old High Germanzāhi—
2Proto-West Germanic*tą̄h(ī)tough
3Proto-Germanictanhuzholding together; clinging; sticky; tenacious;...
4Proto-Indo-Europeandenḱ-to bite
Every word from Proto-Indo-European denḱ- →Every word from Proto-Germanic tanhuz →Every word from Proto-West Germanic *tą̄h(ī) →