334. A noun ending

a. A noun ending in a, when occurring as final member of an adjective compound, is inflected like an original adjective in a, making its feminine likewise in ā or ī (367).

b. For the most part, an adjective compound having a noun in a as final member makes its feminine in ā. But there are numerous exceptions, certain nouns taking, usually or always, ī instead. Some of the commonest of these are as follows: akṣa eye (e.g. lohitākṣī, dvyakṣī, gavākṣī), parṇa leaf (e.g. tilaparṇī, saptaparṇī; butekaparṇā), mukha face (e.g. kṛṣṇamukhī, durmukhī; but trimukhā etc.), an̄ga limb, body (e.g. anavadyān̄gī, sarvān̄gī; but caturan̄gā etc.), keça hair(e.g. sukeçī, muktakeçī or -çā, etc.), karṇa ear (e.g. mahākarṇī; but gokarṇā etc.), udara belly (e.g. lambodarī), mūla root (e.g. pañcamūlī; but oftenerçatámūlā etc.). The very great majority of such nouns (as the examples indicate) signify parts of the body.

c. On the other hand, a feminine noun ending in derivative ā shortens its final to a to form a masculine and neuter base: see 367 c.

d. In frequent cases, nouns of consonant ending are, as finals of compounds, transferred to the a-declension by adding suffix a (1209 a) or ka (1222).