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2Significato: unrelentingtenacious persistent determined obstinaterelentless insistent resolute importunate
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3Significato: characteristiceager anxious insistentearnest importunate urgent
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4Significato: definiteexpressive decided assured assertivepointed insistent energetic emphatic
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5Significato: tenaciousenduring dogged immovable insistentindefatigable persevering persistent