Not agreeable or pleasant; repellent:
Not drawing thanks; unwelcome.
The definition of grateful is feeling or showing thanks or appreciation for something.
(Obsolete) Inestimable; invaluable.
Find another word for unappreciated. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for unappreciated, like: ungratifying, thankless, ungrateful, unthankful, grateful, unsung and unvalued.