Answer: mindless

AnswerCrossword Clue
MINDLESSLunkheaded
MINDLESSVacuous
MINDLESSUnheeding
MINDLESSFoolish
mindless(of an activity) So simple or repetitive as to be performed automatically without thought or skill
mindlesslacking intelligence
mindless(of a person) Acting without concern for the consequences
mindless(esp. of harmful or evil behavior) Done for no particular reason
mindlessNot thinking of or concerned about