not bending or curving; inflexible; rigid.

refusing to yield or compromise; resolute.

austere or formal; aloof.

adjective

bending , flexible , pliable , pliant , relaxed , soft

adjective

aloof , crisp , distant , do or die , dug in , firm , formal , hard as nails , hard-line * , hold one’s ground , hold the fort , hold the line , incompliant , inelastic , inexorable , inflexible , intractable , locked in , obdurate , obstinate , relentless , reserved , resolute , set in stone , severe , single-minded , standing one’s ground , standing pat , sticking to one’s guns , stiff , strict , stubborn , uncompromising , unflexible , unrelenting , unswayable , unyielding , uptight , adamant , adamantine , brassbound , die-hard , grim , implacable , intransigent , iron , remorseless , rigid , unbendable , uncompliant , constant , determined , steadfast , steady , tough , unflinching , unwavering , stern , unpliant