indefatigable tireless unflagging unwearying
indefatigable%5:00:00:energetic:00 tireless%5:00:00:energetic:00 unflagging%5:00:00:energetic:00 unwearying%5:00:00:energetic:00
neutruden neutrudljiv vztrajen
showing sustained enthusiastic action with unflagging vitality
an indefatigable advocate of equal rights a tireless worker unflagging pursuit of excellence