AMELIORATIVE
ameliorative, ameliorating(a), amelioratory, meliorative
(adjective) tending to ameliorate
Source: WordNet® 3.1
Etymology
Adjective
ameliorative (comparative more ameliorative, superlative most ameliorative)
Able to repair or ameliorate.
Noun
ameliorative (plural amelioratives)
That which betters or improves.
(grammar) A construct that implies a more positive or approving outlook.
Source: Wiktionary
A*mel"io*ra*tive, a.
Definition: Tending to ameliorate; producing amelioration or improvement;
as, ameliorative remedies, efforts.
Source: Webster’s Unabridged Dictionary 1913 Edition