Where does “mōtivum” come from?

mōtivum (Latin) comes from Latin movēre, from Proto-Indo-European *m(y)ewh₁-.

Ancestry of “mōtivum”, step by step

Step	Language	Word	Meaning
1	Latin	movēre	—
2	Proto-Indo-European	*m(y)ewh₁-	—

mōtivum — Etymology, Origin & Word History | Etymology Explorer