asperous, bound, corrugated, cragged, craggy, crinkled, crumpled, dour, fettered, firm, fundamentalist, gravelly, hampered, handcuffed, hard, harsh, hidebound, impliable, in bonds, in chains, in irons, inexorable, inflexible, iron, ironclad, ironhanded, jagged, jaggy, manacled, muscle-bound, obdurate, obstinate, orthodox, procrustean, purist, puristic, puritan, puritanic, ragged, relentless, rigid, rigorist, rigoristic, rigorous, rockbound, rocky, rugged, rugose, rugous, saw-toothed, sawtooth, scabrous, scragged, scraggly, scraggy, serrate, serrated, shackled, snagged, snaggled, snaggy, stiff, stony, straightlaced, straitlaced, strapped, stubborn, tethered, tied, tied down, tied up, trammeled, unbending, uncompromising, uneven, unrelenting, unsmooth, unyielding, wrinkled