pĕrenno — Lewis & Short
pĕrenno, āvi, ātum, 1, v. a. and n.id..
ea res, etiamsi non in totum perennat, certe usque in alteram vindemiam plerumque vini saporem servat,Col. 12, 20, 8 (dub.; al. perennem); 12, 19, 2.—
arte perennat amor,Ov. A. A. 3, 42:
ut diutius perennent boves,Col. 1, 9, 2; 2, 9, 18:
domus,Ov. F. 1, 721:
gens ultra aevi nostri terminos perennans,Sol. 52, 29.