meliorate

v. t. [ imp. & p. p. Meliorated p. pr. & vb. n. Meliorating. ] [ L. melioratus, p. p. of meliorare to meliorate, fr. melior better; akin to Gr. ma^llon rather, ma`la very. Cf. Ameliorate. ] To make better; to improve; to ameliorate; to soften; to make more tolerable. [ 1913 Webster ]

Nature by art we nobly meliorate. Denham. [ 1913 Webster ]

The pure and benign light of revelation has had a meliorating influence on mankind. Washington. [ 1913 Webster ]