avouchern.
/əˈvaʊtʃə/ One who avouches.In modern dictionaries.
ΘΚΠ
the mind > language > statement > assertion or affirmation > [noun] > one who
affirmera1425
asserterc1449
protestor?1548
affirmant?1567
avoucher1570
protester1591
assertor1646
predicator1694
allegator1847
1570 J. Dee in H. Billingsley tr. Euclid Elements Geom. Math. Præf. sig. ☞ Plato..the constant auoucher, and pithy perswader of Vnum, Bonum, and Ens.
1583 W. Fulke Def. Transl. Script. xix. 544 The most impudent advoucher..that ever became a writer.
1664 H. Power Exper. Philos. ii. 133 This opinion hath many eminent Advocates and Avouchers.
1678 Spanish Hist. 98 The Secretary..may likewise be an avoucher of the truth of what I say.
This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2020).
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n.1570