Thesaurus.com
Dictionary.com
Definitions

unmindful

[uhn-mahynd-fuhl] / ʌnˈmaɪnd fəl /
ADJECTIVE
not aware or attentive
Synonyms
STRONG
forgetful mindless
WEAK
careless heedless inattentive neglectful oblivious unaware unconscious unwitting
Antonyms
STRONG
mindful
WEAK
attentive aware conscious witting
ADJECTIVE
not paying attention
Synonyms
STRONG
forgetful
WEAK
abstracted careless heedless inadvertent inattentive neglectful negligent oblivious remiss thoughtless unaware unconscious unobservant
Antonyms
WEAK
attentive aware conscious mindful witting

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.