corrugated cragged craggy crinkled crumpled dour firm fundamentalist gravelly hard harsh hidebound impliable inexorable inflexible iron ironbound ironclad ironhanded jagged jaggy muscle-bound obdurate obstinate orthodox procrustean purist puristic puritan puritanic ragged relentless rigid rigorist rigoristic rigorous rocky rugged rugose rugous saw-toothed sawtooth scragged scraggly scraggy serrate serrated snagged snaggled snaggy stiff stony straightlaced straitlaced stubborn unbending uncompromising unrelenting unyielding wrinkled