From Longman Dictionary of Contemporary Englishunthinkingun‧think‧ing /ʌnˈθɪŋkɪŋ/ adjectiveCARELESSnot thinking about the effects of something you say or do —unthinkingly adverbExamples from the Corpusunthinking• But they ignored the unthinkingacceptance that Jeffries enjoyed among a far wider circle of students.• The constantrepetition of an untruth did not make anyone believe, but it could batter the brain into unthinkingapathy.• Trolls are greatly feared because of their unthinkingferocity and indiscriminateappetite.• They can be the quiet, but unthinking types who are simply unaware of their lack of knowledge.