Part of speech: Verb
be on one's guard; be cautious or wary about; be alert to
Example: Beware of telephone salesmen
Categories: Watch, Look out, Watch out
The word "beware" comes from Middle English ben ware, which comes from Middle English bewar. Many other languages have similar words:
be – A related word in the same word family.
ware – A related word in the same word family.
be – A related word in the same word family.
The Anglo-Saxons brought Germanic vocabulary to Britain in the 5th century CE.