Sóþfæst-líc

According to the Old English Dictionary:

sóþfæst-líc

adj. True, sincere:--Hí (patriarchs and martyrs) sungon sigedryhtne sóðfæstlíc lof praise unfeigned, Andr. Kmbl. 1754; An. 879. [Cf. uss birrþ soþfasstlike trowwenn þatt Godess Gast iss soþfasst Godd, Orm. 2995.] soþfæst-lic