adj. 25B6; adjective
unyielding spikes of cane : STIFF, inflexible, unbending, inelastic, firm, hard, solid, tough, tight, compact, compressed, dense.
an unyielding policy : RESOLUTE, inflexible, uncompromising, unbending, unshakeable, unwavering, immovable, intractable, intransigent, rigid, stiff, firm, determined, dogged, obstinate, stubborn, adamant, obdurate, tenacious, relentless, implacable, single-minded; formal pertinacious.