The affix ac comes after the verb hṛñ when it does not mean 'to raise up', when the object is in composition with it.,
This debars अण्. The word उद्यमन् means 'to raise a load'. Thus अंशं हरति = अंशहरः 'who takes a share, or sharer'; so रिक्थहरः 'an heir'. (हृञ् + अच् = हर् + अ = हरः) 7.3.84.
Why do we say 'when it does not mean to raise up'? For then the affix अण् will be employed; as भारहारः 'a burden-bearer, a porter'.
Vart:- This affix comes after the verb ग्रह् when in composition with the words शक्ति 'spear', लाङ्गल 'plough', अङ्कुश 'goad', यष्टि 'staff', तोमर 'an iron club', घट 'jar', घटी 'a small jar', धनुष् 'a bow'; as शक्तिमग्रहः 'a lancer', लाङ्गलग्रहः 'a plough-man', अङ्कुशग्रहः 'an elephant driver', यष्टिग्रहः 'a staff-bearer', तोमरग्रहः 'a club-bearer', घटग्रहः, घटीग्रहः 'a jar-bearer', धनुग्रहः 'a bow-bearer'.
Vart:- This affix comes after the verb ग्रह when the word सूत्र is in composition with it and the sense is that of 'holding'; as सूत्रग्रहः 'a thread-holder'. When it has not this meaning we have सूत्रग्राहः 'a thread-taker'.,