meliorate Look up meliorate at Dictionary.com
1552, "to make better," from L.L. melioratus, pp. of L. meliorare "improve," from melior "better," used as comp. of bonus "good," but probably originally meaning "stronger," from PIE base *mel- "strong, great, numerous" (cf. Gk. mala "very much, very," L. multus "much").