D defs.my
Entry 1 sense Webster, 1913

Hard-shell

/(härd"shĕl`)/ · Hard·-shell · IPA
01 a. Unyielding; insensible to argument; uncompromising; strict.
  1. 1.
    Unyielding; insensible to argument; uncompromising; strict.[Colloq., U.S.]