adjective
1.
Synonyms: imperceptive , impercipient, unperceptive
Antonyms: perceiving, perceptive, percipient
2.
Synonyms: inattentive , inobservant, unheeding, unnoticing, unobservant, unobserving, unwatchful
adjective
1.
Synonyms: imperceptive , impercipient, unperceptive
Antonyms: perceiving, perceptive, percipient
2.
Synonyms: inattentive , inobservant, unheeding, unnoticing, unobservant, unobserving, unwatchful
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003