7. Geur _sharp_, g. s. m. ghéir, f. géire; like the nouns breug, geug.
8. Liath _hoary_, g. s. m. leith, f. léithe; dian _keen_, g. s. m. dhéin, f. déine.
Irregulars. Odhar _pale_, g. s. m. and f. uidhir; bodhar _deaf_, g. s. m. bhuidhir, f. buidhir.
_Dative._--_General rule._ Uasal _noble_, d. s. m. uasal f. uasail; bodhar _deaf_, d. s. m. bodhar, f. bhuidhir.
_Particular rule._ 1. Trom _heavy_, d. s. m. trom, f. thruim.
_Vocative._ Beag _small_, v. s. m. bhig, f. bheag.
In Monosyllables the plural, through all its cases, is formed by adding _a_ to the nom. sing.; in Polysyllables, it is like the nom. sing.; as, crom _crooked_, pl. croma; tuirseach _melancholy_, pl. tuirseach.
A few Dissyllables form their Plural like Monosyllables, and suffer a contraction; as, reamhar _fat_, pl. reamhra, contracted for reamhara. Gen. xli. 20.
All the Cases of Adjectives of the Second Declension are formed according to the general rules for nouns of the second declension; that is, Monosyllables add _e_ for the gen. sing. fem. and for the plural cases; Polysyllables are like the nom. sing. throughout.
In the Second Declension, as in the First, Dissyllables sometimes suffer a contraction in the plural; as, milis _sweet_, pl. milse contracted for milise. { 58}
Adjectives admit the _aspirated form_ through all the Numbers and Cases. In Adjectives beginning with a Labial or a Palatal, the aspirated form alone is used in the gen. and voc. sing. masc. the nom. dat. and voc. sing. feminine.
There are in Gaelic two forms of Comparison, which may be called the _First_ and the _Second Comparative_.
The _First Comparative_ is formed from the gen. sing. mas. by adding _e_; as, geal _white_, g. s. m. gil, comp. gile, ghile; ciontach _guilty_, g. s. m. ciontaich, comp. ciontaiche. Some Adjectives suffer a contraction in the Comparative; as, bodhar _deaf_, comp. buidhre for buidhire; boidheach _pretty_, comp. boidhche for boidhiche.
If the last letter of the gen. be _a_, it is changed into _e_, and _i_ inserted before the last consonant; as, fada _long_, g. s. m. fada, comp. faide; tana _thin_, g. s. m. tana, comp. taine.
_The Second Comparative_ is formed from the first, by changing final _e_ into _id_; as, trom _heavy_, 1. comp. truime, 2. comp. truimid; tiugh _thick_, 1. comp. tiuighe, 2. comp. tiuighid. Many Adjectives, especially Polysyllables, do not admit of the Second Comparative.