"exhausted, fatigued, weary," early 15c., past-participle adjective from tire (v.).
Entries linking to tired
tire v.1
"to weary," also "to become weary," Old English teorian (Kentish tiorian) "to fail, cease; become weary; make weary, exhaust," of uncertain origin; according to Watkins possibly from Proto-Germanic *teuzon, from a suffixed form of PIE root *deu- (1) "to lack, be wanting." Related: Tired; tiring.