verb (tr) obsolete

law to contest (a claim, suit, etc)
to arrange (soldiers) for battle

Derived Formsderaignment or darraignment, noun

Word Origin for deraign

C13: from Old French deraisnier to defend, from Vulgar Latin ratiōnāre (unattested) to reason
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for deraign

Historical Examples of deraign