Lewis Short
(verb) : com-mercor (con-m-), ātus, 1
* To trade, traffic together, buy up, purchase (except in Sall., only ante - class.): captivos,Plaut. Capt. prol. 26; 1, 1, 32: cives, homines liberos,id. Pers. 4, 9, 12: arma, tela, etc.,Sall. J. 66, 1.—Hence, commercātus, a, um, Part. in pass. signif.: edulia, Afran. ap. Non. p. 28, 30.
Charlton T. Lewis, Charles Short, A Latin Dictionary