How do you spell Endless

Available Definitions:
1)  a. - 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)  a. - Infinite; excessive; unlimited.
3)  a. - Without profitable end; fruitless; unsatisfying.
4)  a. - Void of design; objectless; as, an endless pursuit.