gainsay
Speak against firmly
To gainsay is to deny, contradict, or speak against something: No one can gainsay her expertise.
The word is formal and somewhat old-fashioned, appearing most often in negative constructions: There's no gainsaying the evidence.
It suggests disputing what someone has claimed or challenging an established fact.
Deny any association
- repudiateReject as having no authority
- disclaimDeny connection or responsibility
- renounceFormally give up
- retractWithdraw something said
recant · abjure · disown · forswear · abnegate · reject · dismiss · decline
Prove something untrue
- rebutDisprove by argument
- controvertArgue against, deny
- counterFlat service surface
- disproveProve something untrue
confute · negate · invalidate · debunk · discredit · impugn · disconfirm · disaffirm
Assertion or rivalry
- disagreementAbsence of shared opinion
- oppositionActive resistance or dissent
- objectionExpression of disapproval
- dissentDisagreement with authority
protest · rebuttal · refutation · demurral · challenge · quarrel · contravention · resistance
Lack of firm belief
- disbeliefRejection of truth claims
- incredulityInability to accept something
- questioningSeeking answers through inquiry
- distrustAbsence of confidence
suspicion · misgivings · dubiousness · uncertainty · wariness · hesitation · dubiety · qualm
disavow
Deny any association
- repudiateReject as having no authority
- disclaimDeny connection or responsibility
- renounceFormally give up
retract · recant · abjure · disown · forswear · abnegate · reject · dismiss · decline · refuse
refute
Prove something untrue
- rebutDisprove by argument
- controvertArgue against, deny
- counterFlat service surface
disprove · confute · negate · invalidate · debunk · discredit · impugn · disconfirm · disaffirm · oppose
contention
Assertion or rivalry
- disagreementAbsence of shared opinion
- oppositionActive resistance or dissent
- objectionExpression of disapproval
dissent · protest · rebuttal · refutation · demurral · challenge · quarrel · contravention · resistance · defiance
doubt
Lack of firm belief
- disbeliefRejection of truth claims
- incredulityInability to accept something
- questioningSeeking answers through inquiry
distrust · suspicion · misgivings · dubiousness · uncertainty · wariness · hesitation · dubiety · qualm · reservation
gainsayaffirm
Declare to be true
confirm · corroborate · verify · substantiate · attest