Where does “mora” come from?

mora (Old Portuguese) comes from Vulgar Latin mora, from Latin mōrum, from Ancient Greek μόρον, from Proto-Indo-European mórom — mulberry, blackberry.

Ancestry of “mora”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	mora	delay, or any duration of time; hindrance
2	Latin	mōrum	mulberry (fruit)
3	Ancient Greek	μόρον	black mulberry; blackberry
4	Proto-Indo-European	mórom	mulberry, blackberry

Every word from Proto-Indo-European mórom →Every word from Ancient Greek μόρον →Every word from Latin mōrum →