adjective
1.
Synonyms: incautious 1, unalert, unguarded, unvigilant, unwatchful
Antonyms: wary
2.
Synonyms: credulous , unsuspecting, unsuspicious
3.
Synonyms: rash 1, brash, hasty, hotheaded, ill-advised, incautious, inconsiderate, reckless, thoughtless, unadvised
Antonyms: wary