tooth and nail
WordReference English Thesaurus © 2020
Synonyms:
energetically, fervently, forcefully, eagerly , fiercely, vigorously, barbarously, brutally, bestially, brutishly, determindedly, devotedly, ferociously, firmly , seriously , wholeheartedly

'tooth and nail' also found in these entries (note: many are not synonyms or translations):
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