unthinking /ˌʌnˈθɪŋkɪŋ/ adjective Learner's definition of UNTHINKING
[more unthinking; most unthinking]
: done or said in a foolish or careless way without thinking about the possible effects不动脑筋的;考虑不周的;不计后果的 : behaving in a foolish or careless way without careful thought冲动的