Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Origin: ware 'careful' (11-20 centuries), from Old English wær


someone who is wary is careful because they think something might be dangerous or harmful
be wary of (doing) something
I'm a bit wary of driving in this fog.
wary of
We must teach children to be wary of strangers.
Keep a wary eye on the weather before you set sail.
She had a wary expression on her face.
wariness noun [singular, uncountable]
a wariness in her voice
warily adverb:
She eyed him warily.

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