beware

[ bih-wair ]
/ bɪˈwɛər /

verb (used with object)

to be wary, cautious, or careful of (usually used imperatively): Beware such inconsistency. Beware his waspish wit.

verb (used without object)

to be cautious or careful: Beware of the dog.

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Origin of beware

1150–1200; Middle English, from phrase of warning be ware. See be, ware2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for beware

British Dictionary definitions for beware

beware
/ (bɪˈwɛə) /

verb

(usually used in the imperative or infinitive, often foll by of) to be cautious or wary (of); be on one's guard (against)

Word Origin for beware

C13 be war, from be (imperative) + war wary
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012