nĭtĭdo, āvi, ātum, 1, v. a. [nitidus], to make bright or shining, to polish, smooth (poet. and in post-Aug. prose).
I In gen.: ferramenta detersa nitidentur, Col. 12, 3, 9: post serraturam, plagam ferramentis acutis nitidemus, Pall. 3, 17, 1: diligentissime nitidatum, Marc. Emp. 8, 5.—
II In partic., to wash, bathe : eunt ad fontem, nitidant corpora, Enn. ap. Non. 144, 16 (Trag. v 166 Vahl.); so mid.: mundule nitidantur, Att. ib. 17 (Trag. Rel. v. 603 Rib.).