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2Significato: energeticindefatigable unfailing inexhaustibleunflagging stalwart tireless
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3Significato: steadfastresolute unshrinking unfaltering unshaken unwavering unflaggingdetermined constant firm courageous unflinching
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4Significato: assiduoustireless untiring unrelenting persistingunflagging consistent continuous
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5Significato: tirelessenergetic unfailing inexhaustibleunflagging stalwart indefatigable
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6Significato: determineddiligent assiduous steadfast constantsteady resolute unflagging persevering
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7Significato: strongrugged hale tough indefatigablehealthy unflagging robust hardy