The Collaborative International Dictionary of English v.0.48:
Unappreciated \Unappreciated\ See appreciated.WordNet (r) 3.0 (2006):
unappreciated adj 1: not likely to be rewarded; "grading papers is a thankless task" [syn: thankless, unappreciated, ungratifying] 2: having value that is not acknowledged [syn: unappreciated, unsung, unvalued]