Kate M. answered 08/28/20
Writing Tutor * Spanish Tutor * ESL * Editor/Proofreader
Domingo is right in that venom and poison are slightly different. In English, we distinguish between "poison" and "envenom" (as verbs) in the following way:
"TO POISON" means to inject a toxic substance somehow (by giving it to someone to eat or drink, to bite someone with venomous fangs, to put toxins in the air for someone to breathe, etc.). You can poison yourself (by smoking cigarettes), or get poisoned (if you eat an apple that an evil witch has put poison in), or poison someone (by giving them a toxic injection or drink). ALSO we would say, "The evil witch poisoned the apple by dipping it in the poison."
"TO ENVEMON" means to make something poisonous. So, just like in the previous example, we could say, "The evil witch envenomed the apple by dipping it in poison," but we cannot say, "I envenomed my enemy because I wanted to kill him." That would mean we made him into a poisonous or toxic substance.