testify (verb) testify: vouch for; give testimony
Sinonime: 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