The affixes ka and kvip come after the verb sthā when in composition with a word ending in a case-affix or an upasarga ,
Why has this aphorism been made, when by rule (III. I. 4), स्था would have taken क and by rule 3.1.75, it would have taken क्विप् also? This repetition is for the purpose of prohibiting the prohibition, that is to say, the sutra 3.2.14 prohibited the sutra 3.2.4, and the present sutra removes that prohibition. Thus शंस्थः and शंस्थाः । But for this sutra, this form could not have been evolved; for, with the upapada शम्, the verb स्था would have taken the affix अच् by 3.2.14.,