कर्मण्यण्

The affix अण् comes after a verbal root when the object (or whatever sort it may be), is in composition with it (an an उपपद).
The object or karma is of three sorts, namely nivartya, vikarya and prapya.

The object which has a material cause, but such cause is however unexpressed in the sentence, is called nivartya object; as कुम्भम् करोति 'he makes a pot'; here मृत् 'mud' the material cause of कुम्भ is unexpressed, therefore, कुम्भ is nivartya object. Where the material cause itself is changed, by a modification, into something else, such an object is called vikarya object; as काण्डलावः 'the branch-cutter'. While the object which cannot be approached by any action, and is not affected by it, but is always constant, is called the prapya object; as a वेदाध्यायः 'the reading of Veda'; the Veda is always the same.

They will be illustrated by the following examples:- Of the first kind, we have कुम्भकारः 'a potter' and नगरकारः 'a city-builder'; of the second, we have काण्डलावः 'a branch-cutter' and शरलावः 'a reed-cutter'. Of the third, वेदाध्यायः 'the learning of Veda' and चर्चापाठः 'the reading of Charcha'. But compound nouns cannot be formed of such sentences as ग्रामं गच्छति 'he goes to the village', आदित्यं पश्यति 'he sees the sun', हिमवन्तं शृणोति 'he hears the Himavat'. The reason is that it is against the usage of the language to form nouns out of these.

Vart:- The affix ण comes after the verbs शील्, काम्, भक्ष्य and आचर and the noun in composition with it, retains its original accent. As मांसशीलः 'addicted to flesh', fem. मांसशीला; मांसकामः 'loving flesh', fem. मांसकामा; मांसभक्षः 'carnivorous', fem. मांसभक्षा; and कल्याणाचारः 'good-conducted', fem. कल्याणाचारा ।

Vart:- The affix ण comes after the roots ईक्ष 'to look' and क्षम् 'to forbear' under similar circumstances. As सुखप्रतीक्षः, fem. सुखप्रतीक्षा 'expecting happiness'; बहुक्षमः fem. बहुक्षमा 'much forbearing'.