imperscriptible

adjective

not supported by written authority

Word Origin for imperscriptible

C19: from im- (not) + Latin perscribere to write down

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