n. 25B6; adjective
stiff cardboard : RIGID, hard, firm, inelastic, inflexible.
a stiff paste : SEMI-SOLID, viscous, viscid, thick, stiffened, firm.
I'm stiff all over : ACHING, achy, painful; arthritic, rheumatic; informal creaky, rheumaticky, rusty.
a rather stiff manner : FORMAL, reserved, unfriendly, chilly, cold, frigid, icy, austere, wooden, forced, strained, stilted; informal starchy, uptight, stand-offish.
a stiff fine : HARSH, severe, heavy, crippling, punishing, stringent, drastic, draconian; Brit. swingeing.
stiff resistance : VIGOROUS, determined, full of determination, strong, spirited, resolute, tenacious, steely, four-square, unflagging, unyielding, dogged, stubborn, obdurate; N. Amer. rock-ribbed.
a stiff climb : DIFFICULT, hard, arduous, tough, strenuous, laborious, uphill, exacting, tiring, demanding, formidable, challenging, punishing, gruelling; informal killing, hellish; Brit. informal knackering.
a stiff breeze : STRONG, fresh, brisk.
a stiff drink : STRONG, potent, alcoholic.
flexible, plastic, limp, runny, supple, limber, relaxed, informal, lenient, mild, half-hearted, easy, gentle, weak.