invalidate
/ɪnˈvæl.ɪ.deɪt/
"invalidate" is a 10-letter English headword indexed on PlainSpell.
The verdict
“invalidate” is a moderately-common English word, ranked #28,959 in English word frequency and used as a verb.
- #28,959
- frequency rank, English
- 10
- letters
- 14
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - To make invalid. Especially applied to contract law.
| Property | Value |
|---|---|
| Headword | invalidate |
| Language | English |
| Part of speech | Verb |
| IPA | /ɪnˈvæl.ɪ.deɪt/ |
| Letters | 10 |
| Frequency rank | #28,959 |
| Misspellings tracked | 14 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “invalidate” sits in English frequency
Spelling & Dictionary Insight
The English entry for invalidate is 10 letters long, classified as a verb, and transcribed in the International Phonetic Alphabet as /ɪnˈvæl.ɪ.deɪt/. Corpus data places it at rank #28,959 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.
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
- 1To make invalid. Especially applied to contract law.
- 2To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
- 3To render invalid; discredit.
Etymology
First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.
Antonyms
This word in other languages
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.
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
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Using “invalidate”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-V-A-L-I-D-A-T-E - every other letter order is a misspelling in standard orthography.
- Say it as /ɪnˈvæl.ɪ.deɪt/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.