thoughtless ·adjective
Definition: not considering how your actions and words might upset someone else Level: C2
在你总是记得我生日之后，我却忘记了你的生日，这真是我考虑不周。
It was ___thoughtless of me to forget your birthday after you always remember mine.
我后悔在会议上发表了那句欠考虑的话；它可能冒犯了一些同事。
I regret my ___thoughtless comment during the meeting; it may have offended some colleagues.
他深夜播放吵闹音乐这个欠考虑的决定，打扰了整栋公寓楼的人。
His ___thoughtless decision to play loud music late at night disturbed the entire apartment building.