stiffening

Something that is used to make a substance stiff or less soft, as starch.

Something inserted to make a garment, or part of a garment, stiff and capable of keeping its shape. See buckram, crinoline.

Act or process of making stiff.

Something used to make anything stiff.

a permission granted by the customs department to take cargo or ballast on board before the old cargo is out, in order to steady the ship.

An item, material or feature that makes something stiffer.

Present participle of stiffen.

the process of becoming stiff or rigid

the act of becoming stiff