a.

1. 不疲勞的；精神抖擻的
   With unwearied diligence, his eyes pursued the object till it gradually disappeared.

   他的眼光毫無鬆懈地追蹤著這個物體，直到它逐漸消失。

2. 不倦的；不屈不撓的
   We must admit that your unwearied efforts were in some measure successful.

   我們必須承認你們不屈不撓的努力多少是成功的。

adj.