the world > action or operation > manner of action > violent action or operation > severity > [adjective] > not reduced in severity > not able to be (6)
implacable1590
That cannot be assuaged or mitigated. Obsolete.
unpacifiable1595
Not pacifiable; implacable, inconsolable.
unpacificable1608
= unpacifiable, adj.
unassuageable1611
(un-, prefix1 affix 1b.)
unmitigablea1616
That cannot be mitigated; implacable, uncompromising.