Where does “minimus” come from?

minimus (English) comes from Latin minimus, from Proto-Indo-European *(s)mey(h₁)-.

minimus (English): A being of the smallest size; The youngest pupil...

Definitions

Step	Language	Word	Meaning
1	Latin	minimus	least, smallest
2	Proto-Indo-European	*(s)mey(h₁)-	—

minimus — Etymology, Origin & Word History | Etymology Explorer