Being cautious or on guard; showing caution or wariness about something potentially dangerous.
Present participle of 'beware,' from 'be-' plus 'ware.' This form is rarely used in modern English because 'beware' itself is typically used as an imperative or in fixed phrases.
Since 'beware' is an archaic imperative ('Beware!'), the '-ing' form is almost never seen in modern writing. It's grammatically valid but sounds extremely old-fashioned—we'd say 'being cautious' instead.
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