Where does “-torium” come from?

-torium (Latin) comes from Latin -tōrius, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

-torium (Latin): nominative neuter singular of -tōrius; accusative...

Definitions

Step	Language	Word	Meaning
1	Latin	-tōrius	ory
2	Latin	-tor	-er
3	Proto-Italic	-tōr	Forms agent nouns to verb stems
4	Proto-Indo-European	-tōr	Derives agent nouns from verbs, denoting someone...
5	Proto-Indo-European	-tor-s	—