Main Entry: avouch

Pronunciation: \ə-ˈvau̇ch\

Function: transitive verb

Etymology: Middle English, to cite as authority, from Middle French avochier to summon, from Latin advocare — more at advocate

Date: 15th century

1 : to declare as a matter of fact or as a thing that can be proved : affirm
2 : to vouch for : corroborate
3 a : to acknowledge (as an act) as one's own b : confess, avow