1 文書を見つけるための辞書。

• indefatigable, tireless, unwearying, unflagging
• 不撓, 堅忍不抜, 不撓不屈
• showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"
• よどみない活力で熱のこもった行動を支えることを示す