The story
- Latin · derived fromattestor“to witness to, bear witness”
- Middle French · borrowed fromattester
- English todayattest
PIE word *tréyes Borrowed from Middle French attester, from Latin attestor (“to witness to, bear witness”), from at-, combining form of ad (“to”) + testor (“to bear witness”), from testis (“a witness”).
Etymology from Wiktionary, CC BY-SA 4.0.