Meliorate

Mel"io*rate (mēl"y?*rāt), v. t. [imp. & p. p. Meliorated (- rā`tĕd); 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.

Nature by art we nobly meliorate.
Denham.

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

Mel"io*rate, v. i. To grow better.