Also found in: Acronyms.
i·wisalso y·wis (ĭ-wĭs′)
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
an archaic word for certainly
[C12: from Old English gewiss certain]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
[before 900; Middle English, adv. use of neuter of Old English gewiss (adj.) certain, c. Old High German giwis; akin to wit2; see y-]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.