Where does “mion-” come from?

mion- (Irish) comes from Irish mion, from Old Irish mín, from Proto-Celtic mīno- — soft, tender.

mion- (Irish): small, minute; minor, petty; micro-

Definitions

Step	Language	Word	Meaning
1	Irish	mion	small, tiny; fine; detailed
2	Old Irish	mín	smooth, level, calm; self-restrained, gentle,...
3	Proto-Celtic	mīno-	soft, tender

mion- — Etymology, Origin & Word History | Etymology Explorer