The affix ac comes after the verb śī 'to lie down' when in composition with a case-inflected word indicating location i.e. in the Locative -7th-case.,
The word सुप् 3.2.4 a noun ending in a case-affix is understood in this aphorism. As खे शेते = खशयः 'who lies in the sky'.
Vart:- The affix अच् comes after the verb शी when in composition with the words पार्श्व 'ribs', &c., though not necessarily denoting location; as पार्श्वाभ्यां शेते = पार्श्वशयः 'who reclines on his sides', उदरशयः 'who lies on his stomach', पृष्ठशयः 'who lies on his back'.
Vart:- And when the verb शी is preceded by the word दिग्धसह; as दिग्धेन सह शेते = दिग्धसहशयः ॥
Vart:- So also when the words उत्तान &c. are in composition with it denoting agent and in the nominative case. As उत्तानः शेते = उत्तानशयः I अवमूर्द्धा शेते = अवमूर्द्धाशयः ।
Vart:- In the Chhandas the affix डच् comes after the verb शी when in composition with the word गिरि in the locative. As गिरौ शेते = गिरिशः 'who lies on the mountain'.
The letter ड of डच् is indicatory denoting that there is elision of the final vowel with what follows it (I. I. 64).,