Lewis & Short

lăbĕfactātĭo, ōnis, f. [labefacio], a shaking, loosening, weakening.

  1. I. Lit.: dentium, looseness, Plin. 23, 1, 27, § 56.
  2. * II. Trop.: mediocris labefactatio caedi comparatur, Quint. 8, 4, 14: libertatis, Cod. Th. 4, 8, 5, § 5.