From dolos; to ensnare, i.e. (figuratively) adulterate -- handle deceitfully.
see GREEK dolos
1. to ensnare: Hesiod, Herodotus and succeeding writers.
2. to corrupt, (βδελλιον and λίβανον, Dioscor. 1, 80. 81); τόν οἶνον, Lucian, Hermot. 59) τόν λόγον τοῦ Θεοῦ, divine truth by mingling with it wrong notions, 2 Corinthians 4:2. (Cf. Trench, § 62, and see καπηλεύω.)