inconceivable

[ in-kuh n-see-vuh-buh l ]
/ ˌɪn kənˈsi və bəl /

adjective

not conceivable; unimaginable; unthinkable
unbelievable; incredible.

Origin of inconceivable

First recorded in 1625–35; in-3 + conceivable
Related formsin·con·ceiv·a·bil·i·ty, in·con·ceiv·a·ble·ness, nounin·con·ceiv·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for inconceivable

British Dictionary definitions for inconceivable

inconceivable

/ (ˌɪnkənˈsiːvəbəl) /

adjective

incapable of being conceived, imagined, or considered
Derived Formsinconceivability or inconceivableness, nouninconceivably, adverb
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 inconceivable

inconceivable


adj.

1630s, from in- (1) "not, opposite of" + conceivable. Related: Inconcievably. An Old English word for this was unasmeagendlic.

Online Etymology Dictionary, © 2010 Douglas Harper