Not feeling or exhibiting appreciation:
Not agreeable or pleasant; repellent:
Not drawing thanks; unwelcome.
The definition of grateful is feeling or showing thanks or appreciation for something.
Find another word for unthanking. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for unthanking, like: thankless, unappreciative, ungrateful, unthankful and grateful.