After all the feminine nadī -- yū stryākhyau nadī [[1.4.3]] etc., words ending in a short i and u , ām is substituted for the i of the Locative -7th case singular.,
As कृत्याम्, धेन्वाम् ॥ See (1. 4. 6).
The word नदी is understood here also. Objection: If this be so, it is not a really separate sutra, because it is included in the last, and these forms could be obtained by the last sutra: so that we ought to make only one sutra of 117 and 118, as इदुद्भ्यामौत् ॥ Answer: We could not have done so, for then in the case of कृति and धेनु, the औ would have come and not आ, in this way. The आम् would have found scope in nadi words like कुमार्याम्, the औ would have undisputed scope in पत्यौ and सख्यौ; but in the case of कृति when getting the designation नदी the औ would have come, being subsequently taught, and the form would have been कृत्यौ instead of कृत्याम् ॥,