unmindful

adjective un·mind·ful \-ˈmīn(d)-fəl\

: not aware of something that might be important

Full Definition of UNMINDFUL

: not conscientiously aware, attentive, or heedful : inattentive, careless <went shirtless, unmindful of the sun's punishing rays>

See unmindful defined for English-language learners

14th century

Synonyms: clueless, incognizant, innocent, insensible, nescient, oblivious, unacquainted, unaware, unconscious, uninformed, unknowing, ignorant, unwitting

Antonyms: acquainted, aware, cognizant, conscious, conversant, grounded, informed, knowing, mindful, witting

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