Lewis & Short

2. lēvo (laevo), āvi, ātum, 1, v. a. [2. levis], to make smooth, to smooth, polish.

  1. I. Lit.: levare ac radere tigna, Lucr. 5, 1267: corpus, * Cic. Fragm. Or. in Clod. et Cur. 5; Cels. 8, 3: magni levatique mensarum orbes, Sen. Helv. 11, 6: mensas, Stat. Th. 1, 519.
  2. II. Trop., of speech, to smooth down, polish, soften: nimis aspera sano Levabit cultu, Hor. Ep. 2, 2, 123.
    Hence, P. a.: lēvātus, a, um; comp.: quae levatiora levioraque sunt, more highly polished, Gell. 17, 8, 15.