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preventive (adj.)
[preventive 词源字典]
1630s, from Latin
praevent-
, past participle stem of
praevenire
(see
prevent
), +
-ive
. As a noun, from 1630s; in medical use from 1670s.
[preventive etymology, preventive origin, 英语词源]
[preventive 词源字典]