na. | 1. fight [combat] poison with poison; cure a poisoned patient with poison; counteract one toxin [poison] with another; fight fire with fire; Like cures like.; remove a boil with some poisonous drug; set a thief [rogue] to catch another thief [rogue]; treat the malignant disease with poisonous agents; use poison as an antidote to [for] poison; ovietan |