implacable

Từ điển Oxford Learners Wordfinder Dictionary

adjective

incapable of being placated (Freq. 2)
- an implacable enemy
• Ant:
placable
• Similar to:
grim, inexorable, relentless, stern, unappeasable,
unforgiving, unrelenting, unmitigable
• See Also:
merciless, unmerciful