stiffen

stiffen is a   Verb

Definition:

[1] tiono make stiff; to make less pliant or flexible; as, to stiffen cloth with starch. Stiffen the sinews, summon up the blood. Shak.

[2] To inspissate; to make more thick or viscous; as, to stiffen paste.

[3] To make torpid; to benumb.

Synonyms: