unreason
Un*rea"son, n. Etym: [Pref. un- not + reason.] Defn: Want of reason; unreasonableness; absurdity. Abbot of Unreason. See Abbot of Misrule, under Abbot. Un*rea"son, v. t. Etym: [1st pref. un- + reason.] Defn: To undo, disprove, or refute by reasoning. [Obs.] To unreason the equity of God's proceedings. South.