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adverb uk /ˌɪn.dɪˈfæt.ɪ.ɡə.bli/ us /ˌɪn.dɪˈfæt̬.ɪ.ɡə.bli/
(Definition of “indefatigable” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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to make a surface shiny by putting a liquid substance onto it and leaving it or heating it until it dries