Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vēnum-do or vēnun-do (vaen-; also separately, vēnum do, v. infra), dĕdi, dătum, 1, v. a. [2. venus-do, whence also vendo, by contraction], to sell, used chiefly of the sale of captured slaves (not in Cic.) hostes praeter senatores omnes venumdati sunt, Liv. 4, 29, 4: multitudo alia civium Campanorum venum data, id. 26, 16, 6: Numidae puberes interfecti, alii omnes venundati, Sall. J. 91, 6: captivos, Suet. Aug. 21; Tac. A. 14, 33; 13, 39; id. H. 1, 68; id. Agr. 28; Flor. 4, 12, 52: tuque, o Minoa venundata Scylla figura, tondes, etc., sold for, i. e. bribed by, Prop. 3, 19 (4, 18), 21: sententiam, to put up for sale, Tac. A. 11, 22 fin.
In tmesi: se venum a principibus datos Poeno, Liv. 24, 47, 6: praedam venum aut dono datum, Sall. H. 1, 41, 17 Dietsch.