INVALIDATE
\ɪnvˈalɪdˌe͡ɪt], \ɪnvˈalɪdˌeɪt], \ɪ_n_v_ˈa_l_ɪ_d_ˌeɪ_t]\
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By DataStellar Co., Ltd
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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.
By Oddity Software
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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.
By Noah Webster.
By Daniel Lyons
By James Champlin Fernald