ENVENOM

poison, envenom

(verb) add poison to; “Her husband poisoned her drink in order to kill her”

embitter, envenom, acerbate

(verb) cause to be bitter or resentful; “These injustices embittered her even more”

Source: WordNet® 3.1

Etymology

Verb

envenom (third-person singular simple present envenoms, present participle envenoming, simple past and past participle envenomed)

To poison, to put or inject venom onto or into.

To acerbate.

Source: Wiktionary

En*ven"om, v. t. [imp. & p. p. Envenomed; p. pr. & vb. n. Envenoming.] Etym: [OE. envenimen, F. envenimer; pref. en- (L. in) + F. venin poison. See Venom.]

1. To taint or impregnate with venom, or any substance noxious to life; to poison; to render dangerous or deadly by poison, as food, drink, a weapon; as, envenomed meat, wine, or arrow; also, to poison (a person) by impregnating with venom. Alcides . . . felt the envenomed robe. Milton. O, what a world is this, when what is comely Envenoms him that bears it! Shak.

2. To taint or impregnate with bitterness, malice, or hatred; to imbue as with venom; to imbitter. The envenomed tongue of calumny. Smollett. On the question of slavery opinion has of late years been peculiarly envenomed. Sir G. C. Lewis.

Source: Webster’s Unabridged Dictionary 1913 Edition