Where does “arc” come from?

arc (Middle High German) comes from Old High German arg, from Proto-West Germanic arg, from Proto-Germanic argaz, from Proto-Indo-European h₁ergʰ- — to go, move; to mount; to move, go.

Ancestry of “arc”, step by step

Step	Language	Word	Meaning
1	Old High German	arg	bad, wicked, godless
2	Proto-West Germanic	arg	cowardly
3	Proto-Germanic	argaz	unmanly, cowardly, unworthy, indecent
4	Proto-Indo-European	h₁ergʰ-	to go, move; to mount; to move, go

Words derived from “arc”

Arg
arrig
oarg
arglos
argeloos
Arglosigkeit

Every word from Proto-Indo-European h₁ergʰ- →Every word from Proto-Germanic argaz →Every word from Proto-West Germanic arg →