Deraign
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Seems to mean, literally, to cohfound and disorder or to turn out of course or displace; as deraignment or departure out of religion, in St. 31 Hen. VIII. c.
6.
In the common law, the word is used generally in the sense of to prove; vis., to deraign a right, deraign the warranty, etc. Glanv. lib.
2, c. 6; Fitzh. Nat. Brev. 146.
Perhaps this word "deraign," and the word "deraignment," derived from it, may be used in the sense of to prove and a proving, by disproving of what is asserted in opposition to truth and fact.
Jacob.