Lewis Short
(verb) : merso, āvi, ātum, 1, id.
* To dip in, immerse (poet. and in post-Aug. prose).
* Lit.: balantumque gregem fluvio mersare salubri,Verg. G. 1, 272: balneo infertur, calida aqua mersatur,Tac. A. 15, 69.
* Trop., to overwhelm: rerum copia mersat,drowns, destroys,Lucr. 5, 1008: mersor civilibus undis,plunge myself,Hor. Ep. 1, 1, 16.
* Pass.: mersari, to set, of the stars, Mart. Cap. 8, § 844; cf. merto.
Charlton T. Lewis, Charles Short, A Latin Dictionary