Lewis & Short

2. lĕvĭgo, āvi, ātum, 1, v. a. [1. levis], to make light, lighten: gravia, Cassiod. de Amic. prol. § 33: pondus sollicitudinis, Gregor. Ep. 7, 76: omni sarcinā, App. M. 4, p. 142, 23.