INDEFATIGABLE

[in.de.fat.i.ga.ble] ad j [MF, fr. L indefatigabilis, fr. in- + defatigare to fatigue, fr. de- + fatigare to fatigue] (1611): incapable of being fatigued: untiring -- in.de.fa.ti.ga.bil.i.ty n -- in.de.fat.i.ga.ble.ness n -- in.de.fat.i.ga.bly adv