Where does “lassus” come from?

lassus (Old French) comes from Old French sus, from Latin sursum, from Latin versus, from Latin vertō, from Proto-Italic wertō, from Proto-Indo-European wert-, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

Ancestry of “lassus”, step by step

lassus traces back through two separate lines of ancestry.

via Old French sus

StepLanguageWordMeaning
1Old Frenchsusunder; underneath; on; on top of; atop
2Latinsursumabove; upwards, up
3Latinversusturned, changed, having been turned; towards,...
4Latinvertōto turn, turn oneself, direct one's way, to turn about, turn around, revolve
5Proto-Italicwertōto turn
6Proto-Indo-Europeanwert-to turn, to rotate
7Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel

via Old French la

StepLanguageWordMeaning
1Old Frenchlathe; it
2Latinillanominative feminine singular of ille; nominative...
3Latinillethat; those; "; demonstrative pronoun "; that...
4LatinolleArchaic form of ille
5Proto-Italic*olnosthat

Words derived from “lassus

Every word from Proto-Indo-European wer-Every word from Proto-Indo-European wert-Every word from Proto-Italic wertō