tire·less /ˈtaɪrləs/
(a.)不疲倦的,不厭倦的,不屈不撓的
tireless
adj 1: showing sustained enthusiastic action with unflagging
vitality; "an indefatigable advocate of equal rights";
"a tireless worker"; "unflagging pursuit of
excellence" [syn: indefatigable, unflagging, unwearying]
2: characterized by hard work and perseverance [syn: hardworking,
industrious, untiring]