ə̇nˈvaləˌdāt, usu -ād.+V transitive verb
Etymology: invalid (I) + -ate
: to weaken or make valueless : discredit
how far the facts confirm or invalidate this proud claim — Aldous Huxley
deviation from a rule which does not affect any important rights of the alien should not invalidate a deportation hearing — Harvard Law Review
Synonyms: see nullify