indefatigable
adjective formal uk/ˌɪn.dɪˈfæt.ɪ.ɡə.bəl/ us/ˌɪn.dɪˈfæt̬.ɪ.ɡə.bəl/
不倦的;不屈不挠的
always determined and energetic in trying to achieve something and never willing to admit defeat
Annie was an indefatigable campaigner for better community services. 安妮曾为改善社区服务而不懈奔走。
Synonyms: tirelessunflagging