Where does “Terminus” come from?

Terminus comes from Latin terminus, ultimately derived from Proto-Indo-European ter- and térmn̥, roots relating to boundaries or crossing points.

Ancestry of “Terminus”, step by step

Step	Language	Word	Meaning
1	Latin	Terminus	—
2	Proto-Indo-European	ter-	tender, weak; young creature
3	Italian	termine	end, close; limit, term, date, time; term, word
4	Latin	terminus	a boundary, limit, end
5	Proto-Italic	termenos	—
6	Proto-Indo-European	térmn̥	boundary, end

Terminus — Etymology, Origin & Word History | Etymology Explorer