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adjective, if·fi·er, if·fi·est. Informal.
  1. full of unresolved points or questions: an iffy situation.
  2. doubtful; questionable: An early decision on this is iffy.
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Origin of iffy

First recorded in 1915–20; if + -y1
Related formsif·fi·ness, noun

Synonyms for iffy

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for iffy

capricious, chancy, conditional, dicey, doubtful, erratic, incalculable, problematic, undecided, unpredictable, unsettled, whimsical, fluctuant

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Contemporary Examples of iffy

British Dictionary definitions for iffy


adjective iffier or iffiest
  1. informal uncertain or subject to contingencythis scheme sounds a bit iffy
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Word Origin for iffy

C20: from if + -y 1
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 iffy


1937, American English, from if + -y (2). Originally associated with President Franklin D. Roosevelt.

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Online Etymology Dictionary, © 2010 Douglas Harper