- -eoir (slender form)
- -er; suffix appended to words to create an agent noun, indicating a person who does (or a thing that does) something.
- The form is -eoir when the stem ends in a slender consonant.
- All nouns in -óir are masculine nouns of the third declension;
- When attaching to verbs, uses the participle form as the stem:
Declension of -óir