Firmetan

According to the Old English Dictionary:

firmetan

p. firmette, pl. firmetton; pp. firmeted To request, pray; pĕtĕre, rógāre :-- Rómáne hí firmetton ðæt hí ðæt gewin forléton the Romans requested them that they would leave off the siege, Ors. 4, 8; Bos. 89, 21. firmetan