prodigy (n.)youdaoicibaDictYouDict[prodigy 词源字典]
late 15c., "sign, portent, something extraordinary from which omens are drawn," from Latin prodigium "prophetic sign, omen, portent, prodigy," from pro- "forth" (see pro-) + -igium, a suffix or word of unknown origin, perhaps from *agi-, root of aio "I say" (see adage). Meaning "child with exceptional abilities" first recorded 1650s.[prodigy etymology, prodigy origin, 英语词源]