161. Before a nasal in external combination

Before a nasal in external combination, a final mute may be simply made sonant, or it may be still further assimilated, being changed to the nasal of its own class.

Thus, either tád námas or tán námas, vā́g me or vā́n̄ me, báḍ mahā́n or báṇ mahā́n, triṣṭúb nūnám or triṣṭúm nūnám.

a. In practice, the conversion into a nasal is almost invariably made in the manuscripts, as, indeed, it is by the Prātiçākhyas required and not permitted merely. Even by the general grammarians it is required in the compound ṣáṇṇavati, and before mātrā, and the suffix maya (1225): thus, vān̄máya, mṛnmáya.

b. Even in internal combination, the same assimilation is made in some of the derivatives noted in 111 d, and in the na-participles (957 d). And a few sporadic instances are met with even in verb-inflection: thus, stin̄noti, stin̄nuyāt (MS.; for stighn-), mṛnnīta (LÇS.; for mṛdn-), jān̄mayana (KS.; for jāgm-); these, however (like the double aspirates, 154a), are doubtless to be rejected as false readings.