overleaven

== English == === Etymology === From over- +‎ leaven. === Verb === overleaven (third-person singular simple present overleavens, present participle overleavening, simple past and past participle overleavened) To leaven too much. (obsolete, by extension) To change excessively; to spoil. === References === “overleaven”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.