This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. tireless

That cannot be tired out or wearied.

"So it is in rugged crises, in unweariable endurance, and in aims which put sympathy out of question, that the angel is shown."

lightning-bolt    everduring    unworn    postglacial    unvitiated