Endless /(?)/

End·less

Endless

a.
  1. Without end; having no end or conclusion; perpetual; interminable; -- applied to length, and to duration; as, an endless line; endless time; endless bliss; endless praise; endless clamor.
  2. Infinite; excessive; unlimited.
  3. Without profitable end; fruitless; unsatisfying. [R.]
  4. Void of design; objectless; as, an endless pursuit.
  5. having a linear or ribbonlike form with the two ends connected together, such as in a circle, ellipse, torus, or any other closed loop. Belts or chains used in drive mechanisms are considered endless in this sense. See endless chain.

Phrases & Compounds
Endless chain
a chain which is made continuous by uniting its two ends.
Endless screw
See under Screw.