218. Final c reverts to its original

Final श् ç reverts to its original क् k, in internal combination, only before the स् s of a verbal stem or ending (whence, by 180, क्ष् kṣ); before त् t and थ् th, it everywhere becomes ष् ṣ (whence, by 197, ष्ट् ṣṭ and ष्ठ् ṣṭh); before ध् dh, भ् bh, and सु su of the loc. pl., as when final (145), it regularly becomes the lingual mute (ट् ṭ or ड् ḍ).

Thus, ávikṣata, vekṣyā́mi; váṣṭi, viṣṭá, dídeṣḍu; didiḍḍhi, viḍbhís.

a. But a few roots exhibit the reversions of final ç to k before bh and su, and also when final (145): they are diç, dṛç, spṛç, and optionally naç; and viç has in V. always vikṣú, loc. pl., but víṭ, viḍbhís, etc. Examples are díksaṁçita, dṛgbhís, hṛdispṛ́k, nák (or naṭ).

Examples of ç remaining unchanged before vowels etc. are : viçí, viviçyās, aviçran, açnomi, vacmi, uçmási.

b. A ç remains irregularly unchanged before p in the compound viçpáti.