impoison

From Middle English impoisounen, empoisounen, from Old French empoisoner, equivalent to im- +‎ poison.

impoison (third-person singular simple present impoisons, present participle impoisoning, simple past and past participle impoisoned)

1. Obsolete form of empoison.

• “impoison”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.