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Adjective

cautious

IPA /ˈkɔːʃəs/

Careful about what you do because you want to avoid danger, mistakes or other problems that might happen.

See example sentence: cautious

I'm cautious about buying expensive things from shops I don't know.

Adjective

circumspect

IPA /ˈsɜːkəmˌspɛkt/

Careful about what you say or do because you have considered possible risks and want to avoid an unnecessary mistake.

See example sentence: circumspect

She was circumspect about sharing personal details with someone she had just met.

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