Stiff"en, v. i. To become stiff or stiffer, in any sense of the
adjective.
Like bristles rose my stiffening hair.
Dryden.
The tender soil then stiffening by degrees.
Dryden.
Some souls we see, Grow hard and stiffen with adversity.
Dryden.
Stiff"en*er (?), n. One who, or that which, stiffens anything, as a
piece of stiff cloth in a cravat.
Stiff"en*ing, n. 1. Act or process of making stiff.