heavy labor; heavy labour; hard work
hard labor (in prison); hard labour
重労働は体にこたえる。
Heavy labor takes a toll on the body.
彼は長年、重労働に耐えてきた。
He has endured heavy labor for many years.
真夏の引っ越しは重労働で、腰を痛めてしまった。
Moving in midsummer was such heavy labor that I ended up hurting my back.