attest

Universal Words verb (formal) 1 ~ (to sth) to show or prove that sth is true: [V] Contemporary accounts attest to his courage and determination. * She is, as countless stories about her attest, deeply religious. [also Vthat, VN] 2 to state that you believe that sth is true or genuine, for example in a court of law: [VN] to attest a will * The signature was attested by two witnesses. [also Vthat]