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-nasty

a combining form with the meaning “nastic pressure,” of the kind or in the direction specified by the initial element: hyponasty.

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Origin of -nasty

< Greek nast(ós) pressed close (see nastic) + -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for -nasty

-nasty

n combining form

indicating a nastic movement to a certain stimulusnyctinasty
Derived Forms-nastic, adj combining form

Word Origin for -nasty

from Greek nastos pressed down, close-pressed
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