%subsultory%

a. [ L. subsilire, subsultum, to spring up; sub under + salire to leap. ] Bounding; leaping; moving by sudden leaps or starts. [ R. ] -- Sub*sul"to*ri*ly, adv. [R.] [1913 Webster]

Flippancy opposed to solemnity, the subsultory to the continuous, -- these are the two frequent extremities to which the French manner betrays men. De Quincey. [1913 Webster]