Stiffen

·vt To make torpid; to Benumb.

II. Stiffen ·vi To become stiff or stiffer, in any sense of the adjective.

III. Stiffen ·vt To make stiff; to make less pliant or flexible; as, to stiffen cloth with starch.

IV. Stiffen ·vt To Inspissate; to make more thick or viscous; as, to stiffen paste.