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onerous (adj.)
[onerous 词源字典]
late 14c., from Old French
onereus
,
honereus
(14c., Modern French
onéreux
) and directly from Latin
onerosus
, from
onus
(genitive
oneris
) "burden" (see
onus
).
[onerous etymology, onerous origin, 英语词源]
[onerous 词源字典]