Definition of beware in English:

beware

verb

  • no object, in imperative or infinitive Be cautious and alert to risks or dangers.

    ‘shoppers were warned to beware of cut-price fakes’
    ‘Beware! Dangerous submerged rocks ahead’
    with object ‘we should beware the incompetence of legislators’
    • ‘Elderly people are being warned to beware of bogus callers following an attempted burglary.’
    • ‘The commission urged consumers to beware of Web sites promising high income for zero risk.’
    • ‘Parents planning to buy motorised scooters for their children this Christmas are being urged to beware.’
    • ‘She urged people using needles to dispose of them properly and warned other parents to beware of the risks.’
    • ‘But viewer beware, a dry sense of humour is needed to enjoy this movie to its fullest.’
    • ‘Look at what has been achieved for your good in this beautiful market town, but beware of false promises.’
    • ‘We must beware of the danger of confusing what is passionately and deeply wanted with what is a right.’
    • ‘Police are warning people to beware of unscrupulous high-pressure salesmen at their doors.’
    • ‘Always beware of giving your personal details to anyone online, if you are not sure who they are or represent.’
    • ‘However, beware of making compromises with your own values and priorities or you miss life.’
    • ‘Just a word of advice; if you think that such a person is your friend - beware.’
    • ‘A mother is urging parents to beware of thieves selling stolen bikes in the run up to Christmas.’
    • ‘It would be wise to be wary of predictions and to beware of generalisations.’
    • ‘But they have to beware of spilling secrets in front of their old comrades.’
    • ‘If an email asks you to send any private information or do things to your PC, then beware.’
    • ‘Anyway I caution you all to beware of using makeup of any kind that has glitter in it.’
    • ‘Drivers in the city who have not paid their parking fines had better beware.’
    • ‘Just beware of using too much flour, it can make it a little too dry and crumbly.’
    • ‘As you start a new venture beware of losing sight of your own goals and priorities.’
    • ‘But beware of those who claim that we must destroy the system in order to save it.’
    be on your guard, watch out, look out, mind out, be wary, be careful, be cautious, be on the lookout, be on the alert, keep your eyes open, keep a sharp lookout, be on the qui vive
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Origin

Middle English: from the phrase be ware (see be-, ware).

Pronunciation

beware

/bɪˈwɛː/