felicific

fe·li·cif·ic

F0070800 (fē′lĭ-sĭf′ĭk)adj. Producing or intended to produce happiness.
[Latin fēlīx, fēlīc-, fortunate; see dhē(i)- in Indo-European roots + -fic.]

felicific

(ˌfiːlɪˈsɪfɪk) adjmaking or tending to make happy[C19: from Latin fēlix happy + facere to make]

fe•li•cif•ic

(ˌfi ləˈsɪf ɪk)

adj. causing or tending to cause happiness. [1860–65; < Latin fēlīc-, s. of fēlīx happy + -i- + -fic]