Where does “-most” come from?

-most (Middle English) comes from Old English -mest, from Proto-Germanic *-umistaz.

Ancestry of “-most”, step by step

Step	Language	Word	Meaning
1	Old English	-mest	—
2	Proto-Germanic	*-umistaz	—

Words derived from “-most”

Every word from Proto-Germanic *-umistaz →

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