The affix vuñ comes in the sense of 'this is his' after dvanda compound of words denoting 'mutual enmity' or 'matrimonial relationship'.,
This debars अण् and छ ॥ Thus of 'enmity' बाभ्रव्यशालङ्कायनिका, काकोलूकिका ॥ Similarly of married couples as, अत्रिभरद्वाजिका, कुत्सकुशिकिका ॥
The Dvandva compounds of words denoting natural enemies will be singular neuter by 2.4.9. Their secondary derivatives, however, are feminine.
Vart :- Prohibition must be stated of the word देवासुर &c. As देवासुरम् ॥ राक्षोऽसुरम् वैरम् ॥,