392. The root-stems in ir and ur

The root-stems in ir and ur (383 b) lengthen their vowel when the final r is followed by another consonant (245 b), and also in the nom. sing. (where the case-ending sis lost).

a. Thus, from gír f. song come gī́r (gī́ḥ), gíram, girā́, etc.; gírāu, gīrbhyā́m, girós; gíras, gīrbhís, gīrbhyás, girā́m, gīrṣú (165); and, in like manner, frompúr f. stronghold come pū́r (pū́ḥ), púram, purā́, etc.; púrāu, pūrbhyā́m, purós; púras, pūrbhís, pūrbhyás, purā́m, pūrṣú.

b. There are no roots in is (except the excessively rare pis) or in us; but from the root çās with its ā weakened to i (250) comes the noun āçís f. blessing, which is inflected like gír: thus, āçī́s (āçī́ḥ), āçíṣam, āçíṣā, etc.; āçíṣāu, āçī́rbhyām, āçíṣos; āçíṣas, āçī́rbhis, āçī́rbhyas, āçíṣām, āçī́ḥṣu. And sajū́s togetheris apparently a stereotyped nominative of like formation from the root juṣ. The form aṣṭā́prūṭ (TS.), from the root-stem pruṣ, is isolated and anomalous.

c. These stems in ir, ur, is show a like prolongation of vowel also in composition and derivation: thus, gīrvāṇa, pūrbhíd, dhūrgata, dhūstva, āçīrdā́, āçī́rvant, etc. (but also gírvan, gírvaṇas).

d. The native grammar sets up a class of quasi-radical stems like jigamis desiring to go, made from the desiderative conjugation-stem (1027), and prescribes for it a declension like that of āçís: thus, jigamīs, jigamiṣā, jigamīrbhis, jigamīḥṣu, etc. Such a class appears to be a mere figment of the grammarians, since no example of it has been found quotable from the literature, either earlier or later, and since there is, in fact, no more a desiderative stem jigamis than a causative stemgamay.