Category:Old Irish neuter o-stem nouns

Old Irish neuter o-stem nouns.

These nouns are neuter, typically with the following endings:

• in the nominative singular: the bare stem with nasalization of the following word;
• in the genitive singular: the bare stem with raising of the stem vowel where possible, palatalization of the last stem consonant and lenition of the following word;
• in the nominative plural: the bare stem with lenition of the following word and optionally an -a ending (used especially with an indefinite meaning).

The stem classes are named from the perspective of Proto-Celtic and may not still be visible in Old Irish inflections. These nouns derive from Proto-Celtic masculine *-os (masculine) and *-om (neuter) endings.