tireless
adjective uk/ˈtaɪə.ləs/ us/ˈtaɪr.ləs/
不知疲倦的，不觉疲劳的
working energetically and continuously
Tony is a tireless worker. 托尼干起活来不知疲倦。
The prisoner's family is conducting a tireless campaign for his release. 这个囚犯的家人为了他能获释正在不懈地进行活动。
The police have been tireless in their search for the child's killer. 警方一直在不懈地搜寻杀害这个孩子的凶手。