Where does “μόνον” come from?

μόνον (Ancient Greek) comes from Ancient Greek μόνος, from Ancient Greek σπέρμα, from Proto-Hellenic *spérmə.

μόνον (Ancient Greek): only

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	μόνος	alone, forsaken, solitary; only; unique
2	Ancient Greek	σπέρμα	seed; semen, sperm; seed-time, sowing
3	Proto-Hellenic	*spérmə	—