stiffen

== English == === Etymology === From Middle English stifnen, equivalent to stiff +‎ -en. === Pronunciation === IPA(key): /ˈstɪfən/ Rhymes: -ɪfən === Verb === stiffen (third-person singular simple present stiffens, present participle stiffening, simple past and past participle stiffened) (transitive) To make stiff. (intransitive) To become stiff. ==== Synonyms ==== starken ==== Derived terms ==== ==== Related terms ==== stiff ==== Translations ==== === Anagrams === infefts