The affix ghañ comes after the root i 'to go' in composition with the word pari when the sense is that of following in regular succession.,
As पर्यायः 'turn, succession'; तव पर्यायः 'thy turn'; मम पर्यायः 'my turn'.
Why do we say 'when meaning turn'? Observe कालस्य पर्ययः 'the lapse of time'. The word अनुपात्ययः क्रमप्राप्तस्यानतिपातः 'not breaking the series or order'.,