Main entry: unyielding
Definition: resistant to physical force or pressure
Usage: an unyielding head support
Main entry: unyielding, dogged, dour, tenacious, persistent, pertinacious
Definition: stubbornly unyielding
Usage: dogged persistence; dour determination; the most vocal and pertinacious of all the critics; a mind not gifted to discover truth but tenacious to hold it- T.S.Eliot; men tenacious of opinion