. "act. ), 1, v. dep. n. and a. [gratus+ facio], to do a favor to a person, to oblige , gratify; also to do a thing as a favor , to make a present of , surrender , sacrifice" . "act. ), 1, v. dep. n. and a. [gratus+ facio], to do a favor to a person, to oblige , gratify; also to do a thing as a favor , to make a present of , surrender , sacrifice" . .