Correct

哑火

/ yā huǒ / 
Strokes

Example

As an Adjective

(of a shell, bomb, etc) unexploded; dud

1
Zhàdàn
炸弹
yā
哑
huǒ
火
le
了
  
,
méiyǒu
没有
rén
人
shòushāng
受伤
  
。

The bomb fizzled out, and no one was hurt.

As an Adjective

(of a person) quiet