dud

IPA(Pronunciation)

/dʌd/

Noun

informal obsolete

(informal) A device or machine that is useless because it does not work properly or has failed to work, such as a bomb, or explosive projectile. / (informal) A loser; an unlucky person.

Japanese Meaning

（口語）正常に作動せず、役に立たなくなった装置や機械、特に爆弾や爆薬のようなもの。 / （口語）運の悪い人、失敗作または負け犬。

What is this buttons?

The old grenade turned out to be a dud, so the bomb squad breathed a sigh of relief.

Google Translation / DeepL Translation

その古い手榴弾は不発弾だと判明したので、爆発物処理班はほっとした。

Details

Sense（1）

The only amusing highlight was Gudgeon having managed to exploit U.S. codebreaking efforts to ambush and destroy the submarine I-173, albeit not for the lack of the Mark 14's trying to sabotage the effort, as the torpedo that had hit the sub had refused to detonate; it seemed, however, that the car-crash levels of kinetic energy involved in the dud simply ramming the sub had nonetheless done enough to fatally damage it.

Google Translation / DeepL Translation