Wiktionary
adv. Without end; eternally; in an unending manner.
WordNet
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" [syn: endlessly, ceaselessly, incessantly, unceasingly, continuously]
Usage examples of "unendingly".
For they were the dreaded night-gaunts, who never laugh or smile because they have no faces, and who flop unendingly in the dark betwixt the Vale of Pnath and the passes to the outer world.
What we call the stars are only inferences, inferences drawn from the only physical reality we have yet gotten from them - from a careful study of the unendingly complex undulations of the electric and magnetic fields reaching us on earth.
But through the gloom he can now definitely make out a radiance that pours unendingly from the doorway of the Law.