thoughtless

It was thoughtless of you to play loud music while your roommate was sleeping.

(Chinese) 你在室友睡觉时放超大声的音乐真是太欠考虑了。

She regretted her thoughtless remark as soon as she saw the hurt expression on his face.

(Chinese) 一看到他脸上受伤的表情，她就对自己那句欠考虑的话感到后悔。