tirelessness

uncountable

The property of being tireless.

Japanese Meaning

疲れを知らない性質 / 疲れを感じない状態

Her tirelessness during the relief efforts inspired everyone to keep working.

救援活動での彼女の疲れを知らない働きぶりが、皆に励みを与え、働き続けるよう促した。

Sense（1）

The property of being tireless.

His tirelessness in helping the poor won him an award and a nervous breakdown from exhaustion.