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1. Of or relating to Sisyphus.
2. Endlessly laborious or futile: "The jumble of wet pans and platters ... made him weary; to dry them seemed a task as Sisyphean as to repair the things wrong with his parents' house" (Jonathan Franzen).
[From Latin Sisyphēius, from Greek Sisupheios, from Sisuphos, Sisyphus.]
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.
1. (Classical Myth & Legend) relating to Sisyphus
2. actually or seemingly endless and futile
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Sis•y•phe•an(ˌsɪs əˈfi ən)
suggesting or resembling the punishment of Sisyphus in futility or hopelessness: a Sisyphean task.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.