Lewis & Short

cŏ-inquĭno (or contr. cōnquĭno, cf. Lachm. ad Lucr. 2, p. 135), āvi, ātum, 1, v. a., to defile all over, to pollute wholly, to contaminate.

  1. I. Prop. (rare; not in Cic.): stercore conquinatae, Col. 8, 5, 19; 8, 7, 2.
  2. II. Trop.
    1. * A. Of infectious disease, to infect, taint: totam progeniem, Col. 7, 5, 6.
      More freq.,
    2. B. Of vices: matres coinquinari regias, Att. ap. Cic. N. D. 3, 27, 68: se crimine stupri, Val. Max. 6, 1, 6: se maximo scelere, id. 9, 7: cor vitiis, Prud. Cath. 6, 53: famam alicujus, Arn. 4, 151.
      Hence, cŏinquĭnātus, a, um, P. a., polluted, contaminated: quid esse his potest coinquinatius? Arn. 7, p. 222.