implacable

/ɪmˈplækəb(ə)l/

//ɪmˈplækəb(ə)l// adj

By · According to Wiktionary data (CC BY-SA) ·

"implacable" is a 10-letter English headword indexed on PlainSpell.

The verdict

“implacable” has 16 generated spelling variants in the English index at frequency #46,539. The variants make it a useful spelling check.

#46,539
frequency rank, English
2,140
“I” headwords
16
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not able to be placated or appeased.

Corpus desk

Index EN-implacable · implacable · English

implacable · rank #46,539 · 16 variants · 1 confusable

  • FREQ-MID #46,539
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 1 pairs
  • VAR-HIGH 16 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH immigrate

Nearest frequency peer: immigrate (-2 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “implacable”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “implacable” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

implacable vs impeccable
80% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for implacable
PropertyValue
Headwordimplacable
LanguageEnglish
Part of speechAdjective
IPA/ɪmˈplækəb(ə)l/
Letters10
Frequency rank#46,539
Misspellings tracked16
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “implacable”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).implacablelands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “immigrate” (#46,537), “imprisoning” (#46,541), “inclusiveness” (#46,542). Among 2,140 “I” headwords, “implacable” is #46,539. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 16 spelling variants around implacable (IPA /ɪmˈplækəb(ə)l/), anadjective. Corpus frequency is #46,539 among 2,140 “I” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 16 likely wrong-spelling variants for implacable, with forms such as "imlpacable", "immplacable", and "impalcable". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 1 confusable-pair relationship, "impeccable", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: 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 mea… The correct English form is implacable, spelled I-M-P-L-A-C-A-B-L-E.

Definition

  1. 1
    Not able to be placated or appeased.
  2. 2
    Impossible to prevent or stop; inexorable, unrelenting, unstoppable.
  3. 3
    Adamant; immovable.

Recorded use

Wiktionary examples

These source excerpts show how implacable appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. He is knight dubb'd with vnhatche'd Rapier, and on carpet conſideration, but he is a diuell in priuate brall, soules and bodies hath he diuorc'd three, and his incenſement at this moment is ſo implacable, that ſatisfaction can be none, but by pangs of death and ſepulcher: Hob, nob, is his word: giu't or take't.
  2. [I]n the reign of Henry the Second, a body happening, by chance, to be dug up near Glastonbury Abbey, without any symptoms of putrefaction or decay, the Welch, the descendants of the Ancient Britons, tenacious of the dignity and reputation of that illustrious hero [King Arthur], vainly supposed it could be no other than the body of their justly-boasted Pe…

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)).

This word in other languages

implacable(Español)implacable(Français)unversöhnlich(Deutsch)implacável(Português)

Common misspellings

Also misspelled as:

  • imlpacable
  • immplacable
  • impalcable
  • implaacble
  • implacabble
  • implacabel
  • implacablle
  • implacalbe
  • implacbale
  • implaccable
  • implacible
  • implcaable
  • impllacable
  • impplacable
  • ipmlacable
  • miplacable

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of implacable - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

imlpacable2immplacable1impalcable2implaacble2implacabble1implacabel2implacablle1implacalbe2
Edit distance from "implacable"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "implacable"?
"implacable" is spelled I-M-P-L-A-C-A-B-L-E. The IPA pronunciation is /ɪmˈplækəb(ə)l/.
What does "implacable" mean?
As an adjective, "implacable" means: Not able to be placated or appeased.
What words are commonly confused with "implacable"?
"implacable" is commonly confused with "impeccable". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "implacable"?
The IPA (International Phonetic Alphabet) transcription for "implacable" is /ɪmˈplækəb(ə)l/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "implacable"?
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- (... See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "implacable", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

idiopathic#46,533intermodal#46,548lengthwise#46,585geneticist#46,481

Similar misspelling depth

Headwords with a similar count of attested misspellings (16 here; floor ≥5).

homogeneity16 variantsmagnanimous16 variantsmaterialist16 variantsenchantress16 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list