indefatigable

1. ADJ You use indefatigable to describe someone who never gets tired of doing something. 不知疲倦的; 不屈不挠的[正式]

His indefatigable spirit helped him to cope with his illness. 他不屈不挠的精神帮助他对抗病魔。

2. indefatigablyADV [ADV with v, ADV adj]

She worked indefatigably to interest children in music. 她孜孜不倦、积极热情地致力于激发孩子们对音乐的兴趣。