Lewis Short
rĭgesco, gui, 3
* V. inch. n. [rigeo], to grow stiff or numb; to stiffen, harden (poet.).
* Lit.
* With cold: vestes indutae,Verg. G. 3, 363: aquae in grandines,Plin. 2, 63, 63, § 155.
* Transf., to stand erect, stand up, to bristle up: sensi metu riguisse capillos,Ov. F. 1, 97.
* Trop.: numquam corrupta rigescent Saecula? i. e. will grow serious or manly, Claud. in Eutr. 2, 113.
Charlton T. Lewis, Charles Short, A Latin Dictionary