to bear witness; give or afford evidence.

Law . to give testimony under oath or solemn affirmation, usually in court.

to make solemn declaration.

to bear witness to; affirm as fact or truth; attest.

to give or afford evidence of in any manner.

Law . to state or declare under oath or affirmation, usually in court.

to declare, profess, or acknowledge openly.

verb

affirm , announce , argue , assert , attest , bear witness , bespeak , betoken , certify , corroborate , cross one’s heart , declare , demonstrate , depone , depose , evince , give evidence , give facts , give one’s word , indicate , make evident , mount , point to , prove , say so , show , sing * , stand up for , state , swear , swear to , swear up and down , token , warrant , witness , vouch , authenticate , back , bear out , evidence , justify , substantiate , validate , verify , mark , asseverate , express , proclaim , profess