- not likely to be appreciated or rewarded; unappreciated: a thankless job.
- not feeling or expressing gratitude or appreciation; ungrateful: a thankless child.
Origin of thankless
SynonymsSee more synonyms for thankless on Thesaurus.com
1. unacknowledged, vain, unrewarding, profitless.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for thankless
Law-enforcement agencies at all levels of government provide a valuable and often thankless public service in their communities.Are Police Stealing People’s Property?
Joan Blades, Matt Kibbe
January 2, 2015
But it serves no one to perpetuate the idea that parenting is supposed to be an agonizing and thankless slog.Ad's Message to Moms: If You Don’t Think Parenting Sucks, You’re Doing it Wrong
April 18, 2014
Hosting the show really is the most thankless—and one of the most trying—jobs in showbiz, but DeGeneres did a helluva job.Surprise! Ellen DeGeneres is the Best Oscars Host in a Decade
March 3, 2014
Ryan's job is thankless, although he is thanked a lot by others.Whoever Wins What, Watch Out For Minnelli
March 2, 2014
Murmelstein was stuck with a thankless and impossible job, caught between the hammer and the anvil, as he tells us.Confessions of a Death Camp Collaborator: Claude Lanzmann’s ‘The Last of the Unjust’
February 7, 2014
I love them dearly; no people could ever be kinder to a thankless creature than they always are to me.Little Dorrit
Benson undertook the thankless task of undeceiving the public.
The trade of a basket-maker, when followed in such a manner, is a thankless one.The Fortune of the Rougons
Law-enforcement is a thankless job whether on Earth or on Mars.The Man the Martians Made
Frank Belknap Long
Art, then, so thankless as to deny me the first thing I ask of thee?The Sea-Hawk
- receiving no thanks or appreciationa thankless job
- ungratefula thankless pupil
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 thankless
Online Etymology Dictionary, © 2010 Douglas Harper