Learn how to say Mindlessness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mindless:
1acting or done without justification and with no concern for the consequences:
a generation of mindless vandals
(of an activity) so simple or repetitive as to be performed automatically:
the monotony of housework turns it into a mindless task
2 (mindless of) not thinking of or concerned about:
mindless of the fact she was in her nightie, she rushed to the door