be thoughtless
作表语，表示人行为粗心或不顾他人。
He is often thoughtless towards his colleagues.
他常常不顾及同事的感受。
不体贴的；不为别人着想的；缺乏思考的；粗心的；缺乏仔细思考；不顾及他人的；不体贴的；不关心或不考虑他人
Lacking careful thought or consideration; careless.
缺乏思考的；粗心的
Marked by or showing lack of due thought or care.
缺乏仔细思考
showing lack of careful thought
不顾及他人的；不体贴的
Inconsiderate, inattentive.
不关心或不考虑他人
without care or thought for others
欠考虑的；轻率的
Lacking thought or consideration.
It was thoughtless of him to leave the door unlocked when he went out.
他外出时没锁门，真是太粗心了。
用法提示：thoughtless 在此作形容词，表示因缺乏考虑而导致疏忽的行为。
AI contextual example
She regretted her thoughtless comment as soon as she saw his hurt expression.
她一看到他受伤的表情就后悔自己说了那句欠考虑的话。
用法提示：thoughtless 修饰 comment，指未经思考、不体贴的言语。
AI contextual example
A thoughtless driver sped through the puddle, splashing pedestrians.
一个粗心的司机快速驶过水坑，溅了行人一身水。
用法提示：thoughtless 作定语，形容司机不顾及他人的行为。
AI contextual example
作表语，表示人行为粗心或不顾他人。
He is often thoughtless towards his colleagues.
他常常不顾及同事的感受。
后接人或事物，表示对...缺乏考虑。
She made a thoughtless remark about his appearance.
她发表了一句不顾及他外表的评论。
it形式主语，真正主语为不定式，批评某人做某事欠考虑。
It was thoughtless of you to forget her birthday.
你忘记她的生日真是太粗心了。
careless更强调粗心大意，不细心；thoughtless侧重欠考虑。
reckless语气更强，含有不顾危险或后果的意味。
rash强调冲动和草率决定，往往带有贬义。
imprudent较正式，强调缺乏远见或判断力。
inconsiderate侧重对他人感受或需求的不顾及。
grammar · medium
易错句子He thoughtless left the room.
正确表达He thoughtlessly left the room.
形容词"thoughtless"不能直接修饰动词，需要用副词形式"thoughtlessly"。
grammar · medium
易错句子It was thoughtless for him to forget her birthday.
正确表达It was thoughtless of him to forget her birthday.
表示"某人做某事不体贴"时，固定搭配为"It is/was thoughtless of somebody to do something"，介词用"of"而非"for"。
本义项为“欠考虑的、无深虑的”（缺乏仔细思考），thoughtful 是其直接反义词。
本词还可指“不体贴他人”，此时反义词为 considerate；若仅指缺乏仔细思考，宜用 thoughtful。
与“轻率的、粗心的”相对，强调谨慎细致，注意与“体贴的”区分。
与“无深虑的”相对，指留心注意、不疏忽，但不如 thoughtful 直接。
careless强调因疏忽或不够专心而犯错，语气较轻；thoughtless则更突出不考虑他人感受或欠缺思考的后果。
reckless指不顾危险或后果的冲动行为，程度比thoughtless严重；thoughtless更多指缺乏考虑他人感受。
thoughtful是thoughtless的反义词，前者意为考虑周到或关心他人，后者则相反。外形相似但意义对立。
轻率的话语
His thoughtless remark hurt her feelings.
他轻率的话语伤了她的感情。
欠考虑的行为
Breaking the vase was a thoughtless act.
打碎花瓶是欠考虑的行为。
不顾及他人的行为
Her thoughtless behavior made everyone uncomfortable.
她不顾及他人的行为让大家很不舒服。
草率的决定
He regretted his thoughtless decision to quit.
他后悔自己草率的辞职决定。
不体贴的话
She was upset by his thoughtless words.
她被他不体贴的话惹恼了。
thought (思想) + -less (无…的)
thought (思想)
thought (思想) + -ful (充满…的)
care (小心) + -less (无…的)
常与 thoughtless 搭配，指不经思考的言语
thoughtless behavior 指不顾及他人的行为
因缺乏考虑而犯的错误
欠考虑行为带来的结果
因 thoughtless 行为而发出的道歉
一句带来平静的话，胜过千句不经思考的话。
A single thoughtless comment can undo years of trust.
一句轻率的评论就能毁掉多年的信任。
我只想什么都不想。
The song uses 'thoughtless' to describe a desire to escape overwhelming feelings.
这首歌用“thoughtless”来描述逃避强烈情绪的愿望。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.