Etymology
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ameliorate (v.)

1728, "to make better," in some cases perhaps a back-formation from amelioration on pattern of French améliorer, or else from Medieval Latin amelioratus, past participle of ameliorare. Intransitive sense "grow better" is from 1789. The simpler form meliorate was used in Middle English. Related: Ameliorated; ameliorating; ameliorable.

updated on December 30, 2016

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Definitions of ameliorate from WordNet

ameliorate (v.)
to make better;
Synonyms: better / improve / amend / meliorate
ameliorate (v.)
get better;
Synonyms: better / improve / meliorate
From wordnet.princeton.edu, not affiliated with etymonline.