Where does “monastyr” come from?

monastyr (Polish) comes from Russian монасты́рь, from Greek μοναστήρι, from Ancient Greek μοναστήριον, from Ancient Greek μόνος, from Ancient Greek σπέρμα, from Proto-Hellenic *spérmə.

Ancestry of “monastyr”, step by step

Step	Language	Word	Meaning
1	Russian	монасты́рь	monastery, convent
2	Greek	μοναστήρι	An abbey, monastery, convent, cloister
3	Ancient Greek	μοναστήριον	solitary dwelling, hermit's cell; monastery
4	Ancient Greek	μόνος	alone, forsaken, solitary; only; unique
5	Ancient Greek	σπέρμα	seed; semen, sperm; seed-time, sowing
6	Proto-Hellenic	*spérmə	—

Every word from Proto-Hellenic *spérmə →Every word from Ancient Greek σπέρμα →Every word from Ancient Greek μόνος →