as hard as nails

Definition of as hard as nails

  1. :  very tough :  not sentimental or easily influenced He's as hard as nails.

Word by Word Definitions

hardplay
  1. :  not easily penetrated :  not easily yielding to pressure

    :  not capable of being spread :  very firm

    :  having a harsh or acid taste

  1. :  with great or utmost effort or energy :  strenuously

    :  in a violent manner :  fiercely

    :  to an immoderate degree

nailplay nails
  1. :  a horny sheath protecting the upper end of each finger and toe of humans and most other primates

    :  a structure (such as a claw) that terminates a digit and corresponds to a nail

    :  a slender usually pointed and headed fastener designed to be pounded in

  1. :  to fasten with or as if with a nail

    :  to fix in steady attention

    :  catch, trap


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