• adj. 輕率的；欠考慮的；考慮不周的；不顧及他人的

thought,思想，-less,無，沒有。即沒有思想的，引申詞義粗心的。 thousand 一千 來自古英語 thusend,千，來自 Proto-Germanic*thusundi,千，詞首*thu 可能來自 PIE*teue,膨脹， 鼓起，詞源同 thigh,thumb,-sundi,來自 Proto-Germanic*hundam,百，詞源同 hundred.該詞字面 意思為好幾百，后在翻譯拉丁語 mille(千，詞源同 million）的過程中逐漸確定為固定數(shù)詞。

thoughtless (adj.)

1610s, "heedless, imprudent," from thought + -less. Meaning "inconsiderate of others" is from 1794. Related: Thoughtlessly; thoughtlessness.

1. How very thoughtless. I'll give him a piece of my mind.

真是太沒頭腦了，我要告訴他我很生氣。

來自柯林斯例句

2. It was thoughtless of her to mention it.

她提起這事有些欠考慮。

來自柯林斯例句

3. It was just a thoughtless remark.

那不過是一句欠考慮的話。

來自柯林斯例句

4. It was thoughtless of you to forget your sister's birthday.

你真粗心,把你姐姐的生日都給忘了.

來自《簡明英漢詞典》

5. I wonder why you are so thoughtless of others.

我很奇怪,你為何如此不替別人著想.

來自《簡明英漢詞典》