Where does “στάχυον” come from?

στάχυον (Koine Greek) comes from Ancient Greek στάχυς, from Proto-Indo-European ste(n)gʰ- — to stick.

Ancestry of “στάχυον”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	στάχυς	An ear of grain; scion, progeny; Spica, a star in...
2	Proto-Indo-European	ste(n)gʰ-	to stick