Main Entry: em·poi·son

Pronunciation: \im-ˈpȯi-z^ən\

Function: transitive verb

Etymology: Middle English empoysonen, from Anglo-French empoisener, from en- + poison poison

Date: 14th century

1 archaic : poison
2 : embitter <a look of empoisoned acceptance — Saul Bellow>

— em·poi·son·ment \-mənt\ noun