What part of speech is envenom?

Envenom can be categorized as a verb.

Parts of speech

1. envenom is a verb, present, 1st person singular of envenom (infinitive).
2. envenom is a verb (infinitive).

Verb
envenom - add poison to; "Her husband poisoned her drink in order to kill her"
envenom - cause to be bitter or resentful; "These injustices embittered her even more"