Lewis & Short

lābĭlis, e, adj. [1. labor], (post-class. for caducus, infirmus, debilis).

  1. I. Slipping, gliding, prone to slip or slide.
    1. A. Lit.: humus rivis operta sanguineis, gressus labiles evertebat, Amm. 31, 13, 6; Arnob. 2, 59.
    2. B. Trop., fleeting, gliding, prone, transient, perishable: in vitia labiles animae, Arnob. 2, 45: dulcedo, id. 7, 4 init.
  2. II. Causing to slip, slippery: limus, Amm. 27, 10, 11: humus, id. 15, 10, 5.
    Hence. lābĭlĭter, adv., waveringly, Aug. Gen. ad Litt. B. 3.