Where does “Zither” come from?

Zither (German) comes from Old High German zithara, from Latin cithara, from Ancient Greek κιθάρα — lyre; the ribs of the horse; ivy.

Zither (German): zither

Definitions

Step	Language	Word	Meaning
1	Old High German	zithara	—
2	Latin	cithara	cithara, lyre, lute, guitar; guitar
3	Ancient Greek	κιθάρα	lyre; the ribs of the horse; ivy

Zither — Etymology, Origin & Word History | Etymology Explorer