词根词缀：-ative

【来源及含义】Latin: a suffix; tending to

【同源单词】acceleratory, accumulative, agglomerative, agglutinative, agitative, alterative

词根词缀：melior-, meliorat-

【来源及含义】Latin: better, to make better; to improve

【同源单词】Ad praesens ova cras pullis sunt meliora, Aliudque cupido, ameliorable, ameliorate, ameliorating, amelioration