Tooth and nail

adv

Definitions

Adverb
  1. 1
    Viciously; with all one's strength or power; without holding back. figuratively

    "For a century, the two families fought tooth and nail over control of the land."

Adverb
  1. 1
    with force and ferocity wordnet

Etymology

From the Middle English phrase (with) nayles and teþ (“viciously, ferociously”, literally “(with) nails and teeth”).

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