gru·el·ing /ˈgruəlɪŋ/
  嚴罰;嚴懲
  grueling
       adj : characterized by toilsome effort to the point of exhaustion;
             especially physical effort; "worked their arduous way
             up the mining valley"; "a grueling campaign"; "hard
             labor"; "heavy work"; "heavy going"; "spent many
             laborious hours on the project"; "set a punishing pace"
             [syn: arduous, backbreaking, gruelling, hard, heavy,
              laborious, punishing, toilsome]