unwearying

From un- +‎ wearying.

unwearying (comparative more unwearying, superlative most unwearying)

1. Untiring; not becoming tired.

   Synonyms: inexhaustible, tireless, untiring, unflagging, indefatigable

   • 1813 January 27, [Jane Austen], chapter 15, in Pride and Prejudice: […], volume I, London: […] [George Sidney] for T[homas] Egerton, […], →OCLC:

     Mr. Collins repeated his apologies in quitting the room, and was assured with unwearying civility that they were perfectly needless.

   • 1908 October, Kenneth Grahame, chapter 7, in The Wind in the Willows, New York, N.Y.: Charles Scribner’s Sons, →OCLC:

     As a child that has fallen happily asleep in its nurse's arms, and wakes to find itself alone and laid in a strange place, and searches corners and cupboards, and runs from room to room, despair growing silently in its heart, even so Portly searched the island and searched, dogged and unwearying, till at last the black moment came for giving it up, and sitting down and crying bitterly.

   • 1915, Ezra Pound, Cathay‎, London: Elkin Mathews, Poem by the Bridge at Ten-Shin, page 15:

     Night and day are given over to pleasure
     And they think it will last a thousand autumns,
     Unwearying autumns.