invalidate
C1Գոյական/US /ˌɪnvˈælɪdˌeɪt/ ĭnv-ĂL-ĭd-āt; UK /ˌɪnvˈælɪdˌeɪt/ ĭnv-ĂL-ĭd-āt/
To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.
