Old English endeleas "boundless, eternal;" see end (n.) + -less. Compare Old Saxon endilos, Dutch eindeloos, German endlos. Related: Endlessly; endlessness. Old English used endeleasnes for "infinity, eternity."
an endless conversation
endless debates
endless waves
time is endless
an endless chain
ended
endemic
endgame
ending
endive
endless
endlong
endmost
endo-
endocrine
endocrinology