1. To utter (something) stupidly or thoughtlessly . 很愚蠢地且欠考虑的说出（某事）。
2. The principle is repeatedly and thoughtlessly violated. 这条原则被一再无情地违犯着。
3. He curses the unlucky circumstance, in the first years thoughtlessly and out loud, later, as he grows old, he still mumbles to himself. 开始的几年里他不假思索地大声诅咒不幸的环境，后来他慢慢变老，就独自咕噜。
英英解释
adv.
1. in a thoughtless manner
2. showing thoughtlessness
网络释义
thoughtlessly 不体贴地;
轻率;
The one who speaks thoughtlessly pierces like a sword 出言不慎，有如利刃伤人;
智者的口，却常疗愈他人。;
