[adv] continuing forever without end; "there are infinitely many possibilities"
[adv] with unflagging resolve; "dance inspires him ceaselessly to strive higher and higher toward the shining pinnacle of perfection that is the goal of every artiste"
[adv] all the time; seemingly without stopping; "a theological student with whom I argued interminably"; "her nagging went on endlessly"
[adv] (spatial sense) seeming to have no bounds; "the Nubian desert seemed to stretch out before them endlessly"
\End"less*ly\, adv. In an endless manner.