[f. as prec.] The action of the verb.
1648. [P. Heylyn] (title), The Undeceiving of the People in point of Tithes.
1652. T. Nicols, Lapidary, Title-p., Cautions for the undeceiving of all those that deal with Pretious Stones.
a. 1708. Beveridge, Thes. Theol. (1711), III. 331. Godliness is profitable for the soul in its will, by undeceiving of it.
1886. Hall Caine, Son of Hagar, I. ii. The undeceiving came at length, and then the Laird Fisher was old and poor.