Permitted Finals.
139. The sounds allowed to occur as finals in Sanskrit words standing by themselves (not in euphonic combination with something following) are closely limited, and those which would etymologically come to occupy such a position are often variously altered, in general accordance with their treatment in other circumstances, or are sometimes omitted altogether.
a. The variety of consonants that would ever come at the end of either an inflected form or a derivation stem in the language is very small: namely, in forms, only t (or d), n, m, s; in derivative stems, only t, d, n, r, s (and, in a few rare words, j). But almost all consonants occur as finals of roots; and every root is liable to be found, alone or as last member of a compound, in the character of a declined stem.
140. All the vowel sounds, both simple and diphthongal, may be sounded at the end of a word.
a. But neither ṝ nor ḷ ever actually occurs; and ṛ is rare (only as neuter sing. of a stem in ṛ or ar, or as final of such a stem in composition).
Thus, índra, çiváyā, ákāri, nadī́, dā́tu, camū́, janayitṛ́, ágne, çivā́yāi, vā́yo, agnāú.
141. Of the non-nasal mutes, only the first in each series, the non-aspirate surd, is allowed; the others — surd aspirate, and both sonants — whenever they would etymologically occur, are converted into this.
Thus, agnimát for agnimáth, suhṛ́t for suhṛ́d, vīrút for vīrúdh, triṣṭúp for triṣṭúbh.
a. In a few roots, when their final (sonant aspirate) thus loses its aspiration, the original sonant aspiration of the initial reappears: compare ह् h, below, 147.
Thus, dagh becomes dhak, budh becomes bhut, and so on.
The roots exhibiting this change are stated below, 155.
b. There was some question among the Hindu grammarians as to whether the final mute is to be estimated as of surd or of sonant quality; but the great weight of authority, and the invariable practice of the manuscripts, favor the surd.
