Where does “hugely” come from?

Hugely comes from Middle English hugely, of uncertain origin and meaning.

hugely (English): greatly; to a huge extent

Definitions

Step	Language	Word	Meaning
1	Middle English	hugely	—
2	Middle English	huge	huge, large, enormous; great, severe, excessive,...
3	Old French	ahuge	huge; very large
4	Frankish	haug	hill
5	Proto-Germanic	haugaz	height; hill
6	Proto-Indo-European	ḱewk-	flare up, glow; white; to glow, burn, lighten

hugely — Etymology, Origin & Word History | Etymology Explorer