sickliness

Noun

uncountable usually

The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature.

Japanese Meaning

病弱である状態や体力の衰え、慢性的な健康不全の性質 / 健康状態が悪く、弱々しい状態

Despite his cheerful demeanor, his sickliness kept him from joining the arduous expedition.

彼は快活な態度を見せていたが、長年の病弱さがあって過酷な遠征に参加することはできなかった。

Sense（1）

The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature.

I do beseech your majesty, impute his words

To wayward sickliness and age in him.

sicklinesses

（ plural ）