invalidate C2+ Topic:Cause, Change & Process US /ɪnˈvælɪdeɪt/ UK /ɪnˈvælɪdeɪt/ See IPA manual Meanings 1 verb to make something no longer valid or legally binding A single false answer can invalidate the entire survey. Thesaurus Synonyms 1 verb · to make something no longer... nullifyvoidannulnegatecancelrescindquash ↔ Opposites validateconfirmratify Word family Derived forms invalidationinvalidator Related forms invalidvalidvalidate Etymology AI details From in- 'not' plus validate, from Latin validus 'strong' (from valere 'to be strong'); patterned on invalid. validus Latin valere Latin View etymology graph -> Topics Cause, Change & Process Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # invalidate **Type:** Word **Level:** C2+ **Part of speech:** verb **IPA (US):** /ɪnˈvælɪdeɪt/ **IPA (UK):** /ɪnˈvælɪdeɪt/ ## Meanings 1. to make something no longer valid or legally binding ## Examples - A single false answer can invalidate the entire survey. ## Synonyms - nullify - void - annul - negate - cancel - rescind - quash ## Antonyms - validate - confirm - ratify ## Derived Forms - invalidation - invalidator ## Related Forms - invalid - valid - validate ## Roots and Affixes - Root: validus - Root: valere ## Etymology From in- 'not' plus validate, from Latin validus 'strong' (from valere 'to be strong'); patterned on invalid. ## AI Etymology Invalidate comes from in- 'not' plus validate, from Latin validus 'strong' (from valere 'to be strong'); patterned on invalid. The form is best read as a historical transfer or inheritance, with its older language material carrying the main semantic load. As a verb, it means "to make something no longer valid or legally binding", so the modern sense keeps the older action or relation visible. Relevant historical forms include Latin validus and Latin valere. Derivative forms include invalidation, invalidator; related words include invalid, valid, validate. ## Topics - Cause, Change & Process - Word Formation & Derivatives markdown