# invalidate

> English word · Verb · IPA /ɪnˈvæl.ɪ.deɪt/ · frequency rank #28,959

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

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

## Common misspellings (14)
`inavlidate`, `innvalidate`, `invaildate`, `invaldiate`, `invaliadte`, `invalidaet`, `invalidatte`, `invaliddate`, `invalidtae`, `invallidate`, `invlaidate`, `invvalidate`, `ivnalidate`, `nivalidate`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/invalidate