a. rare1. [f. APPEASE + -LESS. Cf. ceaseless.] Not able to be appeased; implacable, insatiable.
1823. Clayton in Charleston Mercury, 30 April, 2/2. The power that constrains me to surrender you over to the appeaseless vengeance of justice, shall never rob me of that internal emotion which answers to the distresses of a fellow being.
1864. Morn. Star, 16 April. The appeaseless maw of the furnace.
1912. Boston Evening Transcript, 8 Aug., 10/5. Too soon she [Julia A. Moore] fell victim to the crass spirit of the age, the appeaseless appetite of our people for the next meteor to trail a pen across the firmament.