'Unappreciated' definitions:

Definition of 'unappreciated'

From: WordNet
adjective
Not likely to be rewarded; "grading papers is a thankless task" [syn: thankless, unappreciated, ungratifying]
adjective
Having value that is not acknowledged [syn: unappreciated, unsung, unvalued]

Definition of 'Unappreciated'

From: GCIDE