Εννοια

• Noun

  1. A piece of indoor sporting equipment used to allow for the motions of running or walking while staying in one place.
  2. A mill worked by persons treading upon steps on the periphery of a wide wheel having a horizontal axis. It was used principally as a means of prison discipline.
  3. A mill worked by horses, dogs, etc., treading an endless belt.
  4. A process or situation in which continued effort leads to or is required for remaining at a particular state or level without moving ahead.

• Verb