lā^trōcĭnālis — Lewis & Short
lā^trōcĭnālis, e, adj.2. latro, II.,
I of or belonging to robbers, robber- (post-class.):
manus,a band of robbers, App. M. 2, p. 125, 5:
castra,Amm. 27, 2.—Hence, adv.: lă-trōcĭnālĭter, after the manner of a robber, like a robber:
aliquem interimere,Mart. Cap. 6, § 642.