immarcescibilis

γέλως τὰ σεμνὰ τοῦ βίου τοῖς σώφροσιν → pompous things in life make men of sound mind laugh (Menander)

Latin > English (Lewis & Short)

immarcescĭbĭlis: (inm-), e, adj. inmarcesco,
I unfading (post-class.): flos, Tert. Cor. Mil. 15: corona, Paul. Nol. Carm. 15.