Stiffening has 4 different meanings across 1 category:
Noun
Noun
1
the act of becoming stiff
"stiffening his shoulders, he prepared to advance"
2
the process of becoming stiff or rigid
3
An item, material or feature that makes something stiffer.
Verb
1
present participle of stiffen
Broader Terms (hypernyms)
Narrower Terms (hyponyms)