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indefatigable▼(extremely persistent and untiring)adjective[UK: ˌɪn.dɪ.ˈfæ.tɪ.ɡəb.l̩] [US: ˌɪn.də.ˈfæ.tɪ.ɡəb.l̩]
tireless▼(indefatigable)adjective[UK: ˈtaɪə.ləs] [US: ˈtaɪər.ləs]
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