I. noun suffix
Etymology: Latin -orium, from neuter of -orius, adjective suffix
1. : place of or for
observat ory
2. : something that serves for
cremat ory
II. adjective suffix
Etymology: Middle English -orie, from Anglo-French & Latin; Anglo-French, from Latin -orius
1. : of, relating to, or characterized by
gustat ory
2. : serving for, producing, or maintaining
justificat ory