UNWEARY
untired, unwearied, unweary
(adjective) with unreduced energy
Source: WordNet® 3.1
Etymology
Adjective
unweary (comparative more unweary, superlative most unweary)
Not weary.
Synonym: unwearied
Verb
unweary (third-person singular simple present unwearies, present participle unwearying, simple past and past participle unwearied)
(transitive) To refresh (a person) after weariness.
Source: Wiktionary
Un*wea"ry, v. t. Etym: [1st pref. un- + weary.]
Definition: To cause to cease being weary; to refresh. [Obs.] Dryden.
Source: Webster’s Unabridged Dictionary 1913 Edition