wantonly

/ˈwɑːn.tən.li/

副词

过分地；恣意地；不负责地
Their lives were brutally and wantonly cut short.
他们的生命被残酷而肆意地断送了。
放荡地，放纵地，放任地
She could not believe that she had behaved so wantonly.
她不敢相信自己的行为如此放纵。