S / subsessa
noun

subsessa

gen. subsessae · gender feminine · decl. 1st
an ambush; ambuscade
an ambush, ambuscade (post-class.): subsessas occultius collocare, Veg. Mil. 3, 6 med.: in subsessā esse, id. ib. 3, 22; cf.: hostium dolos subsessas vocamus, Serv. Verg. A. 11, 268.