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Meaning of thankless

thank•less

Pronunciation: (thangk'lis), [key]
— adj.
  1. not likely to be appreciated or rewarded; unappreciated: a thankless job.
  2. not feeling or expressing gratitude or appreciation; ungrateful: a thankless child.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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