Where does “mastim” come from?

mastim (Portuguese) comes from Old French mastin, from Latin mansuetīnus, from Latin mānsuētus, from Latin mansuēscō, from Latin manus, from Proto-Italic manus, from Proto-Indo-European man- — human being; man; hand.

mastim (Portuguese): mastiff

Definitions

mastiff

Ancestry of “mastim”, step by step

Step	Language	Word	Meaning
1	Old French	mastin	guard dog
2	Latin	mansuetīnus	—
3	Latin	mānsuētus	tamed, tame
4	Latin	mansuēscō	to tame, render mild, gentle, or peaceable
5	Latin	manus	hand; bravery, valor; violence, fighting
6	Proto-Italic	manus	hand
7	Proto-Indo-European	man-	human being; man; hand

Every word from Proto-Indo-European man- →Every word from Proto-Italic manus →Every word from Latin manus →