• (a.) Unyielding; insensible to argument; uncompromising; strict.
Hard'-shell` (härd'shĕl`) adjective Unyielding; insensible to argument; uncompromising; strict. [ Colloq., U. S.]
A high-impact, abrasion-resistant outer fabric, which provides protection from the environment.
a lobster whose shell has fully hardened after molting. Hard-shelled lobsters yield 50-60 % more meat than soft-shelled or shedders.
a hard shell is an outerwear garment which protects the wearer from the elements. It is typically made from a tough, abrasion?resistant material such as nylon (see also soft shell).