肺はいが弱よわい

expression

having weak lungs; having a weak chest

Describes someone prone to respiratory problems or with a delicate constitution regarding the lungs. Often used as a set phrase.

• 彼かれは肺はいが弱よわいので、冬ふゆはいつも咳せきをしている。

  He has weak lungs, so he's always coughing in winter.

• 子こ供どもの頃ころから肺はいが弱よわくて、よく気き管かん支し炎えんになった。

  I've had weak lungs since childhood and often got bronchitis.