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2Significado: tirelessenergetic unfailing inexhaustibleunflagging stalwart indefatigable
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3Significado: diligentassiduous indefatigable persevering persistentsedulous untiring patient
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4Significado: tenaciousenduring dogged immovable insistentindefatigable persevering persistent
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5Significado: strongrugged hale tough indefatigablehealthy unflagging robust hardy