tireless
US
UK tireless adj: (person: hardworking)
SC 孜孜不倦的 zī zī bú juàn de
SC 不知疲倦的 zī zī bú juàn de，bù zhī pí juàn de
Kenneth is tireless and often works late into the night.
tireless adj: (work: sustained)
SC 坚韧的 jiān rèn de
TC 堅韌的
TC 堅韌的
SC 持久的 jiān rèn de ，chí jiǔ de
At work, Carl was known for his tireless diligence.