Wanton
/ˈwɒntən/ adjective mediumDeliberately careless or unrestrained, especially in causing harm without any real justification.
The report condemned the wanton destruction of the ancient forest to build a parking lot.
Memory Trick
Wanton originally meant 'undisciplined,' built from an old prefix for 'lacking' plus a word for 'trained' -- picture someone who was simply never taught any restraint, so they act with no regard for consequences.