implacable

im·pla·ca·ble

adjective \(ˌ)im-ˈpla-kə-bəl, -ˈplā-\

Definition of IMPLACABLE

: not placable : not capable of being appeased, significantly changed, or mitigated <an implacable enemy>

— im·pla·ca·bil·i·ty \-ˌpla-kə-ˈbi-lə-tē, -ˌplā-\ noun

— im·pla·ca·bly \-ˈpla-kə-blē, -ˈplā-\ adverb

Examples of IMPLACABLE

1. He has an implacable hatred for his political opponents.
2. <an implacable judge who knew in his bones that the cover-up extended to the highest levels of government>

Origin of IMPLACABLE

Middle English, from Latin implacabilis, from in- + placabilis placable

First Known Use: 15th century

Related to IMPLACABLE

Synonyms

adamant, adamantine, bullheaded, dogged, hard, hardened, hardheaded, hard-nosed, headstrong, immovable, obstinate, inconvincible, inflexible, intransigent, mulish, obdurate, opinionated, ossified, pat, pertinacious, perverse, pigheaded, self-opinionated, self-willed, stiff-necked, stubborn, unbending, uncompromising, unrelenting, unyielding, willful (or wilful)

Antonyms

acquiescent, agreeable, amenable, compliant, complying, flexible, pliable, pliant, relenting, yielding

Related Words

anal-retentive, obsessive; wayward, wrongheaded; determined, hell-bent, inexorable, persistent, relentless, resolved, set, single-minded, steadfast, stouthearted, tenacious, unflinching; firm, hard-line, hard-shell (or hard-shelled), iron, severe, stern, strict; hidebound, narrow-minded, rigid; bloody-minded [chiefly British], cantankerous; contrary, cussed; contumacious, disobedient, froward, insubordinate, intractable, recalcitrant, refractory, uncooperative, ungovernable, unmanageable, unruly; defiant, insurgent, mutinous; indomitable, invincible, unconquerable; confirmed, inveterate, unregenerate; demanding, exacting

Near Antonyms

docile, obedient, placable, submissive, tractable; accepting, persuadable, receptive, responsive, willing; governable, manageable, reasonable, temperate; slavish, subservient