invalidate

/ɪnˈvæl.ɪ.deɪt/

//ɪnˈvæl.ɪ.deɪt// verb

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

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

The verdict

“invalidate” has 14 generated spelling variants in the English index at frequency #28,959. The variants make it a useful spelling check.

#28,959
frequency rank, English
2,140
“I” headwords
14
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To make invalid. Especially applied to contract law.

Corpus desk

Index EN-invalidate · invalidate · English

invalidate · rank #28,959 · 14 variants · 0 confusables

  • FREQ-MID #28,959
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 14 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH instill

Nearest frequency peer: instill (-1 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 “invalidate”

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

corpus weight

What this shows “invalidate” 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
Key facts for invalidate
PropertyValue
Headwordinvalidate
LanguageEnglish
Part of speechVerb
IPA/ɪnˈvæl.ɪ.deɪt/
Letters10
Frequency rank#28,959
Misspellings tracked14
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “invalidate”

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).invalidatelands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “instill” (#28,958), “infrequently” (#28,957), “jazzy” (#28,961). Among 2,140 “I” headwords, “invalidate” is #28,959. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 14 spelling variants around invalidate (IPA /ɪnˈvæl.ɪ.deɪt/), averb. Corpus frequency is #28,959 among 2,140 “I” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 14 likely wrong-spelling variants for invalidate, with forms such as "inavlidate", "innvalidate", and "invaildate". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate. The correct English form is invalidate, spelled I-N-V-A-L-I-D-A-T-E.

Definition

  1. 1
    To make invalid. Especially applied to contract law.
  2. 2
    To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
  3. 3
    To render invalid; discredit.

Recorded use

Wiktionary examples

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

  1. The circuit court judge's ruling was invalidated by a superior judge.
  2. Telling an angry person to "calm down" can invalidate their feelings.

Etymology

First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.

Synonyms

disprovevitiatenegate

Antonyms

validate

This word in other languages

invalider(Français)entkräften(Deutsch)

Common misspellings

Also misspelled as:

  • inavlidate
  • innvalidate
  • invaildate
  • invaldiate
  • invaliadte
  • invalidaet
  • invalidatte
  • invaliddate
  • invalidtae
  • invallidate
  • invlaidate
  • invvalidate
  • ivnalidate
  • nivalidate

Misspelling Pattern Breakdown

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

inavlidate2innvalidate1invaildate2invaldiate2invaliadte2invalidaet2invalidatte1invaliddate1
Edit distance from "invalidate"

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 "invalidate"?
"invalidate" is spelled I-N-V-A-L-I-D-A-T-E. The IPA pronunciation is /ɪnˈvæl.ɪ.deɪt/.
What does "invalidate" mean?
As a verb, "invalidate" means: To make invalid. Especially applied to contract law.
What are common misspellings of "invalidate"?
Common misspellings include "inavlidate", "innvalidate", "invaildate", "invaldiate", "invaliadte". The correct spelling is "invalidate".
How do you pronounce "invalidate"?
The IPA (International Phonetic Alphabet) transcription for "invalidate" is /ɪnˈvæl.ɪ.deɪt/. 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 "invalidate"?
First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate. 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 "invalidate", not the corpus desk frequency band.

Same letter count

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

guillotine#28,937Guggenheim#28,936freelancer#28,928metastatic#28,992

Similar misspelling depth

Headwords with a similar count of attested misspellings (14 here; floor ≥5).

Guangdong14 variantsgestation14 variantsextremity14 variantsecumenical14 variants

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

Source: FrequencyWords open word-frequency list