fledglingyoudaoicibaDictYouDict[fledgling 词源字典]
also fledgeling, 1830, "untried" (adj.), in Tennyson; 1846 as a noun meaning "young bird" (one newly fledged); from fledge + diminutive suffix -ling. Of persons, from 1856.[fledgling etymology, fledgling origin, 英语词源]