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muggy

[muhg-ee] /ˈmʌg i/
adjective, muggier, muggiest.
1.
(of the atmosphere, weather, etc.) oppressively humid; damp and close.
Origin
1725-1735
1725-35; mug to drizzle (noun and v.) (< Scandinavian; compare Old Norse mugga mist, drizzle) + -y1
Related forms
muggily, adverb
mugginess, noun
Antonyms
dry.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for mugginess

muggy

/ˈmʌɡɪ/
adjective -gier, -giest
1.
(of weather, air, etc) unpleasantly warm and humid
Derived Forms
muggily, adverb
mugginess, noun
Word Origin
C18: dialect mug drizzle, probably from Scandinavian; compare Old Norse mugga mist
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
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Word Origin and History for mugginess
muggy
1731, from mugen "to drizzle" (late 14c.), from O.N. mugga "drizzle, mist," related to mjukr "soft," or O.N. mygla "mold," which is cognate with L. mucus "snot."
Online Etymology Dictionary, © 2010 Douglas Harper
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