hard labor

• He got home pretty late that night , and when he climbed cautiously in at the window , he uncovered an ambuscade , in the person of his aunt ; and when she saw the state his clothes were in her resolution to turn his saturday holiday into captivity at hard labor became adamantine in its firmness
  那天晚上，他回到家时已经很迟了。当他小心翼翼地从窗户往里爬时，猛然间发现了有人埋伏，仔细一看，原来是他的波莉姨妈。她看到他衣服被弄成那副样子，原来就打算让汤姆在星期六休息日干活的决心现在就更加坚定了。