1.
[syn: grim, inexorable, relentless, stern, unappeasable, unforgiving, unrelenting]
The Collaborative International Dictionary of English v.0.48:
Unappeasable \Unappeasable\
See appeasable.
WordNet (r) 3.0 (2006):
unappeasable
adj 1: not to be placated or appeased or moved by entreaty;
"grim determination"; "grim necessity"; "Russia's final
hour, it seemed, approached with inexorable certainty";
"relentless persecution"; "the stern demands of
parenthood" [syn: grim, inexorable, relentless,
stern, unappeasable, unforgiving, unrelenting]