AVOUCH', verb transitive [Latin voco, advoco. See Voice.] 1. To affirm; to declare or assert with positiveness. 2. To produce or call in; to affirm in favor of, maintain or support. Such antiquities could be avouched for the Irish. 3. To maintain, vindicate or justify. AVOUCH', noun Evidence; testimony; declaration. [Little used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI