1.
suffix forming nouns denoting a place for a particular function (dormitory; refectory).
Derivatives:
-orial suffix forming adjectives.
Etymology: L -oria, -orium, sometimes via ONF and AF -orie, OF -oire 2.
suffix forming adjectives (and occasionally nouns) relating to or involving a verbal action (accessory; compulsory; directory).
Etymology: L -orius, sometimes via AF -ori(e), OF -oir(e)