empoison

verb (used with object)

1. to corrupt: to empoison the minds of the young.
2. to embitter: His own failure has empoisoned him.
3. Archaic. to poison.

verb (tr)

1. rare to embitter or corrupt
2. an archaic word for poison (def. 6), poison (def. 7), poison (def. 8), poison (def. 9)