相关单词同义词arduous, exertive, 近义词 sweat 汗水, burdensome 负担的, arduous 费力的, grueling 折磨人的, gruelling 繁重而累人的..., laborious 艰苦的, hard 硬的, strenuous 奋发的, exhausting 疲倦的, taxing 费力的, wearisome 使疲倦的, punishing 艰难持久的, operose 费力的, toilsome 费力的, heavy 大(量)的临近词back, backpart相似词backbite, backbiting, backboard, backbone, backchannel, backchat, backcomb, backcountry, 返回 backbreaking