In the ṛg veda the final of 1. kavi 2. adhvara and 3. pṛtanā is dropped before the Denominative affix kyac ,
As कव्यन्तः सुमनसः (not in the Rig Veda), अध्वर्यन्तः (not in this case in the Rig Veda), पृतन्यन्तस्तिष्ठन्ति (not in this connection in the Rig. Veda). The examples given above are of Kasika : according to Pro. Bohtlingk none of them are from the Rig Veda. The following are given by Bhattoji Dikshita in his Siddhanta Kaumudi: स पूर्वया निविदा कव्यतायोः (Rig I. 96. 2). अध्वर्युं वा मधुपाणिम् (Rig X. 41. 3), दमयन्तं पृतन्युम् ॥,