Correct

如堕烟海

/ rú duò yānhǎi / 
Strokes

Example

Definition

be bewildered; be at a complete loss; be all at sea

1
Nǐ
你
de
的
jiěshì
解释
shǐ
使
wǒ
我
rú
如
duò
堕
yānhǎi
烟海
  
。

I am completely at a loss with your explanation.