Unyielding in will; not subject to persuasion or influence; inflexible; resolute; -- applied to persons.

Unyielding in nature; unchangeable; fixed; -- applied to abstract ideas; as, unbending truths.

incapable of adapting or changing to meet circumstances; "a rigid disciplinarian"; "an inflexible law"; "an unbending will to dominate"

Devoted to relaxation or amusement.

Not bending; not suffering flexure; not yielding to pressure; stiff; -- applied to material things.