Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rūfo, āre, v. a. [rufus], to make or color reddish: capillum, Plin. 15, 22, 24, § 87; 23, 2, 32, § 67; 23, 4, 46, § 91.
1. rūfus, a, um, adj. [kindr. with ruber], red, reddish, of all shades, acc. to Gell. 2, 26, 5.
In gen.: rufus quidam, redhaired, red-headed, Plaut. Ps. 4, 7, 119: virgo, Ter. Heaut. 5, 5, 17; id. Phorm. 1, 2, 1 (cf. rufulus): vestibus, Mart. 14, 129, 1: sanguis, Cels. 2, 8: armenta, Vitr. 8, 3: sal, Plin. 31, 7, 41, § 86.
Comp.: Campana siligo rufior, Plin. 18, 9, 20, § 86; 16, 14, 25, § 65.