Anything added to something in order to stiffen it, such as a support beam, or starch for a collar. / (slang) An alcoholic drink taken to fortify oneself.

plural of stiffener

(transitive) To make stiff. / (intransitive) To become stiff.

Third-person singular simple present indicative form of stiffen

simple past tense and past participle of stiffen

An item, material or feature that makes something stiffer.

present participle of stiffen

plural of stiffening

(Australia, obsolete) A person employed to kill dingos so as to eradicate them from a certain region.

plural of dingo stiffener