invalidate
/ɪnˈvæl.əˌdeɪt/verb
invalidate is spelled I-N-V-A-L-I-D-A-T-E: 10 letters and 4 syllables. It appears 1.0 times per million words in written English, the 28,918th most frequent word form (wordfreq, 2021 data). As a verb, invalidate means “To make invalid (especially in to contract law)” (English Wiktionary, September 2026).
How many letters and syllables are in invalidate?
| Letters | 10: I-N-V-A-L-I-D-A-T-E |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | 1.0 times per million words; the 28,918th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is invalidate?
Invalidate appears 1.0 times per million words in written English, the 28,918th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce invalidate?
- UK /ɪnˈvæl.ɪ.deɪt/
- US /ɪnˈvæl.əˌdeɪt/
- Australia /ɪnˈvæl.ə.dæɪt/
Invalidate has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vininn126-invalidate.wav, Wikimedia Commons (author and licence on each file's page).
Forms of invalidate
- invalidates present, singular, he/she/it
- invalidating participle, present
- invalidated participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does invalidate mean?
The meanings the English Wiktionary records, quoted as written there (source below).
verb
- 1
To make invalid (especially in to contract law)
The circuit court judge's ruling was invalidated by a superior judge.
- 2
To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
- 3
To render invalid; discredit.
Telling an angry person to "calm down" can invalidate their feelings.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Invalidate in Spanish, French, German and Portuguese
In the sense to make invalid:
| Language | Words |
|---|---|
| French | invalider |
| German | entkräften |
| Spanish | invalidar |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does invalidate come from?
First attested in 1649; borrowed from Middle French invalider, from invalide + -er. By surface analysis, in- + validate or invalid + -ate.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).