attest

[ uh-test ]
/ əˈtɛst /

verb (used with object)

to bear witness to; certify; declare to be correct, true, or genuine; declare the truth of, in words or writing, especially affirm in an official capacity: to attest the truth of a statement.
to give proof or evidence of; manifest: His works attest his industry.
to put on oath.

verb (used without object)

to testify or bear witness (often followed by to): to attest to the reliability of an employee.

noun

Archaic. witness; testimony; attestation.

Origin of attest

1590–1600; (< Middle French attester) < Latin attestārī to bear witness to, equivalent to at- at- + testārī ( test(is) a witness + -ā- thematic vowel + -rī infinitive suffix)

OTHER WORDS FROM attest

British Dictionary definitions for unattested

attest
/ (əˈtɛst) /

verb

(tr) to affirm the correctness or truth of
(when intr, usually foll by to) to witness (an act, event, etc) or bear witness to (an act, event, etc) as by signature or oath
(tr) to make evident; demonstrate his life of luxury attests his wealth
(tr) to provide evidence for the marks in the ground attested the presence of a fossil

Derived forms of attest

attestable, adjective attestant, attester, esp law attestor or attestator, noun attestation (ˌætɛˈsteɪʃən), noun

Word Origin for attest

C16: from Latin attestārī to prove, from testārī to bear witness, from testis a witness