fatigueless,a.|fəˈtiːglɪs| [f. fatigue n.and v. + -less.] Without fatigue; unwearying; tireless. 1818J. Brown Psyche 42 Endow'd them with fatigueless care.1879Jefferies Wild Life in S.C. 132 Riders upright and fatigueless.1889Talmage Serm. in The Voice 2 May, The angels are a fatigueless race.