Beware

/bɪˈwɛər/

Meaning & Definition

verb
Used to warn someone to be cautious or alert to danger or risk.
Beware of the dog; it may bite.
To be cautious or careful about something.
You should beware of scams when shopping online.
To be on one's guard or alert to potential danger.
Beware of falling rocks while hiking in the mountains.

Etymology

Middle English; from be- + ware (adjective meaning 'wary')

Common Phrases and Expressions

beware the Ides of March
a warning to be cautious about the dangers that may come at a specific time
beware of Greeks bearing gifts
an admonition to be wary of those who may seem friendly but have ulterior motives

Related Words

wary
feeling or showing caution about possible dangers or problems
caution
care taken to avoid danger or mistakes
alert
quick to notice any unusual and potentially dangerous or difficult circumstances

Slang Meanings

heads up
Just a heads up, watch out for that guy.
keep your eyes peeled
Keep your eyes peeled for any suspicious behavior.