suavity (n.)youdaoicibaDictYouDict[suavity 词源字典]
c. 1400, "pleasantness, delightfulness; kindness, gentleness," from Latin suavitatem (nominative suavitas) "sweetness, agreeableness," from suavis (see suave). Some later senses are from French suavité, from Old French soavite "gentleness, sweetness, softness," from the Latin word.[suavity etymology, suavity origin, 英语词源]