transitive verb

1. to declare to be true or genuine
2. to certify by oath or signature
3. to serve as proof of; demonstrate; make clear
4. to place (a person) on oath
5. Linguis. to verify the existence of (a form believed to have occurred in a language) an attested form is written in an etymology without an asterisk before it

Etymology: Fr attester < L attestari < ad-, to + testari, to bear witness < testis, a witness: see testify

intransitive verb