• vi. 跌跌撞撞地走；犯大错
• vt. 做错
• n. 大错

词源同blind, 眼盲的。

blunder

blunder: [14] When blunder first entered the language, it meant ‘stumble around blindly, bumping into things’, which gives a clue to its possible ultimate connection with blind. Its probable source was Old Norse blundra ‘shut one’s eyes’, forerunner of Swedish blunda and Norwegian blunda (Jon Blund is the Swedish equivalent of ‘the sandman’), and very likely a descendant of Indo-European *bhlendhos, from which blind comes. The first record of the modern sense ‘foolish mistake’ comes in Edward Phillips’s The new world of English words 1706.
=> blind

blunder (v.)

mid-14c., "to stumble about blindly," from a Scandinavian source akin to Old Norse blundra "shut one's eyes," from PIE root *bhlendh- (see blind). Meaning "make a stupid mistake" is first recorded 1711. Related: Blundered; blundering.

blunder (n.)

mid-14c., apparently from blunder (v.), though of about the same age.

1. It had been a monumental blunder to give him the assign-ment.

当时把这项任务给他是大错特错了。

来自柯林斯例句

2. The government committed a double blunder.

政府重蹈覆辙。

来自柯林斯例句

3. to make a terrible blunder

犯大错

来自《权威词典》

4. She cast a sidelong glance at Eric to see if he had noticed her blunder.

她偷偷斜扫了埃里克一眼，看他有没有留意到她的错误。

来自《权威词典》

5. I saw that I had been guilty of a careless blunder.

我意识到自己因疏忽而酿成大错.

来自《简明英汉词典》