acarpousyoudaoicibaDictYouDict[acarpous 词源字典]
"Not producing fruit; unfruitful, sterile; ( Botany ). Frequently figurative : failing to achieve the desired results, unproductive; barren", Late 19th cent. From ancient Greek ἄκαρπος without fruit, barren (from ἀ- + κάρπος fruit: see carpo-) + -ous; compare -carpous.[acarpous etymology, acarpous origin, 英语词源]