The affix ya comes in the sense of 'nature or action thereof' after the word sakhi,
As सख्यम् 'friendship'.
Vart:- So also after the words दूत and वणिक्, as, दूत्यम् and वणिज्यम् ॥ The word वाणिज्यम् is formed by (V. I. 124), वणिक् belonging to ब्राह्मणादि class.,