rigid, hard, stiff, tough, unyielding

exchange of fire, knock, crackle, peal (of thunder), rattle; hard frost, frozen stiff, intense heat

heavy, difficult, hard to digest, indigestible, lazy, burdensome

hard labor, toil, effort, exertion

hard-working, laboring, pertaining to labor

sediment, solid matter settled at the bottom of a liquid, material deposited by ice, wind, water

solid (as opposid to liquid)

firm, solid, staunch, steadfast, serious, hard, unwavering; firmly, tightly, strongly

to make firm, hard solid, to fasten, to secure, to lock, to staunchly defend

to become firm, solid, to be hardened, to solidify; to became staunch, secured