For the visarga of a word ending in as with the exception of an indeclinable, s is substituted in a compound when a form of kṛ and kam or the words 1. kaṃsa 2. kumbha 3. pātra 4. kuśā and 5. karṇī follow and the first word is not preceded by another word.,
Thus कृ :- अयस्कारः, पयस्कारः 3.2.1 कम् :- अयस्कामः, पयस्कामः, कंस :- अयस्कंसः, पयस्कंसः, कुम्भः, - अयस्कुम्भः पयस्कुम्भः ॥ So also अयस्कुम्भी पयस्कुम्भी, on the maxim प्रातिपदिकग्रहणे लिङ्गविशिष्टस्यापि ग्रहणं भवति ॥ पात्र :- अयस्पात्रम्, पयस्पात्रम्, अयस्पात्री, पयस्पात्री कुशा :- अयस्कुशा, पयस्कुशा ॥ कर्णी :- अयस्कर्णी, पयस्कर्णी ॥ The form शुनस्कर्णः belongs to Kaskadi class 8.3.48.
Why do we say अतः \a visarga preceded by short अ, or the visarga of the word ending in अः\? See गीःकारः, धूःकारः ॥ Why do we say 'preceded by short अ'? Observe भाःकरणम् ॥ The form भास्करः belongs to Kaskadi class 8.3.48. See also 3.2.2.
Why do we say \with the exception of an Indeclinable\? Observe श्वःकारः, पुनःकारः ॥
The word समासे is understood here also. Therefore not here; यशः करोति पयः करोति, यशः कामयते ॥
The word अनुत्तरपदस्थस्य is also to be read in this. Therefore not here, परमपयः कारः, परमपयः कामः ॥
Question: The word कंस need not have been taken, because it is a form of the root कम्, since it is derived from कम् by adding the Unadi affix स (III. 62 Unadi)?
Answer:- The employment of कंस indicates the existence of the following maxim:- उणादयोऽव्युत्पन्नानि प्रातिपदिकानि \Words which end with उण् &c. are crude-forms that do not undergo or cause such operations as would depend on their etymological formation.\,