Where does “grevain” come from?

grevain (Old French) comes from Old French greve, from Latin gravis, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.

grevain (Old French): dangerous; perilous

Definitions

dangerous; perilous

Ancestry of “grevain”, step by step

Step	Language	Word	Meaning
1	Old French	greve	greave; terrible, dreadful; shin
2	Latin	gravis	heavy; troublesome, hard; grave, serious
3	Proto-Indo-European	gʷréh₂us	heavy
4	Proto-Indo-European	-us	Forms adjectives from Caland system roots

Every word from Proto-Indo-European -us →Every word from Proto-Indo-European gʷréh₂us →Every word from Latin gravis →