相关单词同义词hard, rapid, bold, struggling, 近义词 hard 硬的, laborious 艰苦的, strenuous 奋发的, difficult 困难的, formidable 强大的, exacting 严格的, tiresome 令人厌倦的, painful 痛苦的, grueling 折磨人的, gruelling 繁重而累人的..., operose 费力的, toilsome 费力的, demanding 要求多的, onerous 繁重的, tiring 令人疲倦的, taxing 费力的, straining 拉紧, punishing 艰难持久的, heavy 大(量)的, backbreaking 非常辛苦的临近词are, ardour, arduously, arduousness, arduous work, arduous task, arduous paths, arduous adj., arduous journey, arduous efforts, arduous struggle相似词arcuate, arcus, ardent, ardour, are, are my eyes deceiving me? idiom, area, area code, 返回 arduous