in ‧ at ‧ ten ‧ tive /ˌɪnəˈtentɪv◂/ BrE AmE adjective
[ Word Family: noun : ↑ attention , ↑ attendant , ↑ attentiveness ≠ ↑ inattentiveness ; verb : ↑ attend ; adverb : ↑ attentively ≠ ↑ inattentively ; adjective : ↑ attentive ≠ ↑ inattentive ]
not giving enough attention to someone or something OPP attentive :
accidents caused by inattentive or reckless drivers
—inattentively adverb
—inattentiveness noun [uncountable]