Synonyms for Unappreciative:

adj.

thankless (adjective)
thoughtless, unthanking, heedless, ungrateful, unthankful.
ungrateful (adjective)
thankless, unthankful, heedless, thoughtless, ungrateful.

Other synonyms:

unthanking.

Usage examples for unappreciative

  1. Not a cent of it does this ungrateful, unappreciative family get. – The High Calling by Charles M. Sheldon