marcescent (adj.)youdaoicibaDictYouDict[marcescent 词源字典]
"withering," 1727, from Latin marcescentem (nominative marcescens), present participle of marcescere "to wither, languish, droop, decay, pine away," inchoative of marcere "to wither, droop, be faint," from PIE root *merk- "to decay."[marcescent etymology, marcescent origin, 英语词源]