Where does “horizon” come from?

horizon (Latin) comes from Ancient Greek ὁρίζων, from Ancient Greek ὅρος, from Proto-Hellenic wórwos, from Proto-Indo-European werw-.

Ancestry of “horizon”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὁρίζων	horizon
2	Ancient Greek	ὅρος	boundary, limit, frontier, landmark; marking...
3	Proto-Hellenic	wórwos	—
4	Proto-Indo-European	werw-	—

horizon — Etymology, Origin & Word History | Etymology Explorer