(v) make ineffective by counterbalancing the effect of, Syn. negate, neutralise, nullify, Example:Her optimism neutralizes his gloom; This action will negate the effect of my efforts
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
v. t. [ imp. & p. p. Abnegated; p. pr. & vb. n. Abnegating. ] [ L. abnegatus, p. p. of abnegare; ab + negare to deny. See Deny. ] To deny and reject; to abjure. Sir E. Sandys. Farrar. [ 1913 Webster ]