Standard Lemma guide

implacable

adj · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ɪmˈplækəb(ə)l/
  • Received-Pronunciation: /-ˈpleɪ-/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /ɪmˈplækəbəl/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 M P L AE1 K AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Not able to be placated or appeased.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: impacable, irreconcilable, unassuageable, unplacable, unpleasable

Antonyms: appeasable, assuageable, pacable, pacifiable, placable

2

adj

Meaning 2

Impossible to prevent or stop; inexorable, unrelenting, unstoppable.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: relentless, unremitting, unyielding

Antonyms: none provided

3

adj

Meaning 3

Adamant; immovable.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adjective

Meaning 4

incapable of being placated

Definition source: Princeton WordNet 3.0

Examples

  • an implacable enemy

Meaning relationships

Synonyms: none provided

Antonyms: placable

History

Etymology

From Middle English implācāble (“immitigable, unappeasable”) from Old French implacable (“harsh, unrelenting; implacable”) (modern French implacable), from Latin implācābilis (“unappeasable, implacable; irreconcilable”), from im- (variant of in- (prefix meaning ‘not’)) + plācābilis (“placable; appeasing, moderating, pacifying, propitiating; acceptable”) (from plācō (“to assuage, pacify, placate; to appease; to reconcile”) + -bilis (suffix forming adjectives indicating a capacity or worth of being acted upon)).

Across languages

Translations

65 source translations are retained for this English entry.

  • Azerbaijani: barışmaz — not able to be placated or appeased
  • Bulgarian: неумолим (neumolim) — not able to be placated or appeased
  • Catalan: implacable — not able to be placated or appeased
  • Czech: neuklidnitelný — not able to be placated or appeased
  • Czech: neutišitelný — not able to be placated or appeased
  • Czech: nesmiřitelný — not able to be placated or appeased
  • Dutch: onverzoenlijk — not able to be placated or appeased
  • Finnish: leppymätön — not able to be placated or appeased
  • Georgian: შეუბრალებელი (šeubralebeli) — not able to be placated or appeased
  • German: unversöhnlich — not able to be placated or appeased
  • Gothic: 𐌿𐌽𐌷𐌿𐌽𐍃𐌻𐌰𐌲𐍃 (unhunslags) — not able to be placated or appeased
  • Greek: ανευμενίσιμος (anevmenísimos) — not able to be placated or appeased
  • Greek: ανευμενίσιμη (anevmenísimi) — not able to be placated or appeased
  • Greek: ανευμενίσιμο (anevmenísimo) — not able to be placated or appeased
  • Greek: αμείλικτος (ameíliktos) — not able to be placated or appeased
  • Greek: αδυσώπητος (adysópitos) — not able to be placated or appeased
  • Ancient Greek: ἄσπονδος (áspondos) — not able to be placated or appeased
  • Ancient Greek: ἄθελκτος (áthelktos) — not able to be placated or appeased
  • Hungarian: engesztelhetetlen — not able to be placated or appeased
  • Irish: doshásta — not able to be placated or appeased
  • Italian: implacabile — not able to be placated or appeased
  • Latin: implācābilis — not able to be placated or appeased
  • Latin: implācābile — not able to be placated or appeased
  • Manx: neuveeinagh — not able to be placated or appeased
  • Māori: kaikiko — not able to be placated or appeased
  • Middle English: implācāble — not able to be placated or appeased
  • Norwegian: uforsonlig — not able to be placated or appeased
  • Persian: رام نشدنی — not able to be placated or appeased
  • Persian: آشتی ناپذیر — not able to be placated or appeased
  • Polish: nieubłagany — not able to be placated or appeased
  • Portuguese: implacável — not able to be placated or appeased
  • Romanian: implacabil — not able to be placated or appeased
  • Russian: непримири́мый (neprimirímyj) — not able to be placated or appeased
  • Russian: неумоли́мый (neumolímyj) — not able to be placated or appeased
  • Russian: закля́тый (zakljátyj) — not able to be placated or appeased
  • Spanish: implacable — not able to be placated or appeased
  • Turkish: yatıştırılamaz — not able to be placated or appeased
  • Ukrainian: непримире́нний (neprymyrénnyj) — not able to be placated or appeased
  • Ukrainian: непримири́мий (neprymyrýmyj) — not able to be placated or appeased
  • Bulgarian: жесток (žestok) — impossible to prevent or stop — see also inexorable, unstoppable
  • French: implacable — impossible to prevent or stop — see also inexorable, unstoppable
  • French: irréductible — impossible to prevent or stop — see also inexorable, unstoppable
  • Georgian: შეუბრალებელი (šeubralebeli) — impossible to prevent or stop — see also inexorable, unstoppable
  • Greek: αδυσώπητος (adysópitos) — impossible to prevent or stop — see also inexorable, unstoppable
  • Greek: αδυσώπητη (adysópiti) — impossible to prevent or stop — see also inexorable, unstoppable
  • Italian: implacabile — impossible to prevent or stop — see also inexorable, unstoppable
  • Manx: neuveeinagh — impossible to prevent or stop — see also inexorable, unstoppable
  • Russian: неумолимый (neumolimyj) — impossible to prevent or stop — see also inexorable, unstoppable
  • Spanish: implacable — impossible to prevent or stop — see also inexorable, unstoppable
  • Ukrainian: невблаганний (nevblahannyj) — impossible to prevent or stop — see also inexorable, unstoppable
  • Ukrainian: непримире́нний (neprymyrénnyj) — impossible to prevent or stop — see also inexorable, unstoppable
  • Bulgarian: непреклонен (nepreklonen) — adamant; immovable — see also adamant, immovable
  • Danish: stædig — adamant; immovable — see also adamant, immovable
  • German: unerbittlich — adamant; immovable — see also adamant, immovable
  • Hungarian: kérlelhetetlen — adamant; immovable — see also adamant, immovable
  • Romanian: de neclintit — adamant; immovable — see also adamant, immovable
  • Romanian: ferm — adamant; immovable — see also adamant, immovable
  • Romanian: imobil — adamant; immovable — see also adamant, immovable
  • Romanian: nemișcat — adamant; immovable — see also adamant, immovable
  • Romanian: nemișcabil — adamant; immovable — see also adamant, immovable
  • Russian: непрекло́нный (nepreklónnyj) — adamant; immovable — see also adamant, immovable
  • Russian: несдвига́емый (nesdvigájemyj) — adamant; immovable — see also adamant, immovable
  • Spanish: implacable — adamant; immovable — see also adamant, immovable
  • Spanish: tenaz — adamant; immovable — see also adamant, immovable
  • Swedish: enveten — adamant; immovable — see also adamant, immovable