invalid1
Syllabification: (in·va·lid)
Pronunciation: /ˈinvəlid/
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[ with object]
Definition of invalid
noun
verb ( invalids, invaliding, invalided)
Derivatives
Pronunciation: /-ˌizəm/
noun
Origin:
mid 17th century (as an adjective in the sense 'infirm or disabled'): a special sense of invalid2, with a change of pronunciation