संस्‍कृतशब्‍दकोशः

उपकर्तृ

उपकार करने वाला

one who does a service, benefactor

Monier–Williams

उपकर्तृ — {upa-kartṛ} mf({trī})n. one who does a favour, one who benefits, a helper MBh. Ragh. Hit. Sāh