treadmill

Universal Words noun 1 [sing.] work or a way of life that is boring or tiring because it involves always doing the same things: I'd like to escape the office treadmill. 2 [C] (especially in the past) a large wheel turned by the weight of people or animals walking on steps around its inside edge, and used to operate machinery 3 [C] an exercise machine that has a moving surface that you can walk or run on while remaining in the same place: I try to do half an hour's exercise on the treadmill every morning.