相关单词同义词tough, indefatigable, tireless, 近义词 constant 不变的, assiduous 勤勉的, undaunted 不屈不挠的, tenacious 抓紧的, tireless 不知疲倦的, determined 坚定的, dogged 顽固的, indefatigable 不知疲倦的, steady 稳定的, persistent 坚持的, patient 有耐心的, hardworking 努力工作的, industrious 勤劳的临近词UNCCD, UN, unending circulation, unmatch record check, uncontrolled missile, Unpollinated ovaries, unmortgaged property, un-get-at-able, untreated wastewater, Unna-Taenzer stain, unregulated variable, unexectued agreement相似词until, until all hours idiom, until you are blue in the face idiom, untimely, untitled, unto, unto thine own self be true idiom, untogether, 返回 untiring