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caution [caution 词源字典]: caution: see show
[caution etymology, caution origin, 英语词源]
caution (n.): c. 1300, "bail, guarantee, pledge," from Old French caution "security, surety" (13c.), from Latin cautionem (nominative cautio) "caution, care, foresight, precaution," noun of action from past participle stem of cavere "to be on one's guard" (see caveat). The Latin sense re-emerged in English 16c.-17c. Meaning "word of warning" is from c. 1600.
caution (v.): "to warn," 1640s, from caution (n.). Related: Cautioned; cautioning.
cautionary (adj.): "conveying a warning," 1590s, from caution (n.) + -ary.
cautious (adj.): 1640s, from caution + -ous. The Latin word for this was cautus "careful, heedful." Related: Cautiously; cautiousness.
incautious (adj.): 1703, from in- (1) + cautious. Related: Incautiously.
over-cautious (adj.): 1706, from over- + cautious. Related: Over-cautiously; over-cautiousness.
precaution (n.): c. 1600, from French précaution (16c.) and directly from Late Latin praecautionem (nominative praecautio) "a safeguarding," from past participle stem of Latin praecavere "to guard against beforehand," from prae "before" (see pre-) + cavere "to be one's own guard" (see caution (n.)). The verb meaning "to warn (someone) in advance" is from c. 1700.
precautionary (adj.): 1720, from precaution + -ary.
precautious (adj.): 1680s, from precaution + -ous. Related: Precautiously; precautiousness.