rūgo, āvi, ātum, 1, v. n. and a. [1. ruga].
I Neutr. , to crease , wrinkle; transf., of the dress (cf. 1. ruga, B.), to become wrinkled or rumpled : vide palliolum ut rugat, Plaut. Cas. 2, 3, 30: pallium, id. Fragm. ap. Gell. 18, 12, 3.—
II Act. , to wrinkle any thing: frontem, Hier. Ep. 50, 2.—Transf., to corrugate : testae (concharum) rugatae, Plin. 9, 33, 52, § 102.