incogitable

Derived Formsincogitability, noun
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


Word Origin and History for incogitable
adj.

"unthinkable," 1520s, from Late Latin incogitabilis, from in- "not" (see in- (1)) + cogitabilis, from stem of cogitare (see cogitation).

Online Etymology Dictionary, © 2010 Douglas Harper