There are two exceptions—viz., te, hot, warm; and beo, alive. Te (often spelled teiṫ, becomes teo in the genitive singular feminine, and also in the plural of both genders.
Beo, alive, becomes beoḋa in the plural. In the singular it is quite regular, except after the word Dia; its genitive is then ḃí, as Mac Dé ḃí, the Son of the living God.
Rules for the Aspiration of the Adjectives.
These rules really belong to Syntax, but for the convenience of the student we give them here.
149. (a) An adjective beginning with an aspirable consonant is aspirated in the nominative and accusative feminine singular, in the genitive masculine singular, and in the dative and vocative singular of both genders.
(b) The adjective is also aspirated in the nominative and accusative plural when the noun ends in a slender consonant.
Exceptions to the Rules for Aspiration.
150. (a) An adjective beginning with d or t is usually not aspirated when the noun ends in d, n, t, l, or s (dentals).
(b) c and g are usually not aspirated when the preceding word ends in c, g, or ng.
(c) p and b are usually not aspirated when the preceding word ends in p, b, or m.
