tumescence (n.)youdaoicibaDictYouDict[tumescence 词源字典]
1725, from French tumescence, from Latin tumescentem (nominative tumescens) "swelling," present participle of tumescere "begin to swell, swell up," figuratively "grow excited, become enraged," inceptive of tumere "to swell" (see tumid) + inchoative suffix -escere.[tumescence etymology, tumescence origin, 英语词源]