Where does “over” come from?

Over comes from Middle English over, Old English ofer, Proto-Germanic uber, and Proto-Indo-European upér and upo, meaning positioned above or beyond.

over (English): Discontinued; ended or concluded; Thoroughly;...

Definitions

Step	Language	Word	Meaning
1	Middle English	over	riverbank, seashore, brink
2	Old English	ōfer	riverbank, seashore, brink, edge, margin, border
3	Proto-West Germanic	obar	over, above
4	Proto-Germanic	uber	over; over, above
5	Proto-Indo-European	upér	above; over
6	Proto-Indo-European	upó	under, below
7	Proto-Indo-European	h₃ewp-	—

over — Etymology, Origin & Word History | Etymology Explorer