相关单词近义词 punishing 艰难持久的, arduous 费力的, laborious 艰苦的, exhausting 疲倦的, demanding 要求多的, tiring 令人疲倦的, strenuous 奋发的, severe 严厉的, unremitting 不懈的, harsh 粗糙的, operose 费力的, toilsome 费力的, heavy 大(量)的, backbreaking 非常辛苦的, gruelling 繁重而累人的..., hard 硬的临近词gruel 返回 gruelingly