from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Impossible to appease or satisfy: unappeasable thirst and hunger.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. not able to be appeased or satisfied
from The Century Dictionary and Cyclopedia
- Not to be appeased or pacified; implacable: as, unappeasable anger.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not to be placated or appeased or moved by entreaty
un- + appeasable (Wiktionary)