Where does “abesse” come from?

abesse (Middle English) comes from Middle French abaisser, from Old French abaissier, from Old French baissier, from Vulgar Latin bassio, from Latin Bassus, from Ancient Greek βάσις, from Proto-Hellenic gʷə́tis, from Proto-Indo-European gʷémtis — to step.

Ancestry of “abesse”, step by step

Step	Language	Word	Meaning
1	Middle French	abaisser	to astonish, alter
2	Old French	abaissier	to prostrate oneself; to lower, to reduce
3	Old French	baissier	to lower
4	Vulgar Latin	bassio	I lower
5	Latin	Bassus	thick, fat, stumpy, short, low, base
6	Ancient Greek	βάσις	step; rhythm; foot
7	Proto-Hellenic	gʷə́tis	step
8	Proto-Indo-European	gʷémtis	step, act of walking
9	Proto-Indo-European	gʷem-	to step

Every word from Proto-Indo-European gʷem- →Every word from Proto-Indo-European gʷémtis →Every word from Proto-Hellenic gʷə́tis →