英汉解释

adv. 粗心地；不注意地；无忧无虑地

同义词

r. heedlessly，incautiously，raffishly，rakishly

反义词

r.   carefully，cautiously，with kid gloves

参考例句

1. He stuffed the letter carelessly into his pocket.
他随随便便地把信往口袋里一塞。
2. They played carelessly, and they deserved to lose.
他们漫不经心地踢，当然会输了。
3. To waste time is to expend it thoughtlessly or carelessly.
浪费时间是指不加考虑、漫不经心地消耗时间。

英英解释

adv.
  1. without care or concern
  2. without caution or prudence
  3. in a rakish manner

网络释义

carelessly
粗心地; 漫不经心; 不小心地,粗心地; 不小心;
carelessly hastily
草草;
drop litter carelessly
乱扔垃圾;
carelessly with a heavy hand
粗心地;
carelessly forgetfully inadvertently inattentively inobservantly
不注意地;