ben·e·fac·tion 
(b
ĕn
ə-f
ăk
′sh
ən, b
ĕn
′ə-f
ăk
-)
n.1. The act of conferring aid of some sort.
2. A charitable gift or deed.
[Late Latin benefactiō, benefactiōn-, from Latin benefactus, past participle of benefacere, to do a service : bene, well; see deu-2 in the Appendix of Indo-European roots + facere, to do; see dhē- in the Appendix of Indo-European roots.]
bene·fac′tive (-tĭv) adj.