名詞 petard:

1. a explosive device used to break down a gate or wall

1. The police hoisted the criminal with his own petard.
   警察使罪犯搬起石頭砸自己的腳。

pe.tard

n.（名詞）
A small bell-shaped bomb used to breach a gate or wall.
攻城炸藥箱：用來(lái)炸開(kāi)大門(mén)或墻壁的一種鐘形小炸彈
A loud firecracker.
爆竹，鞭炮

來(lái)源：
French pétard
法語(yǔ) pétard
from Old French
源自 古法語(yǔ)
from peter [to break wind]
源自 peter [放屁]
from pet [a breaking of wind]
源自 pet [屁]
from Latin pôditum [from neuter past participle of] pôdere [to break wind] * see pezd-
源自 拉丁語(yǔ) pôditum [] 源自pôdere的中性過(guò)去分詞 [放屁] *參見(jiàn) pezd-