Efen-blissian

According to the Old English Dictionary:

efen-blissian

part. -blissiende; p. ode; pp. od [blissian to rejoice] To rejoice with, to rejoice equally; congrātŭlāri :-- Efenblissiende Breotone on his geleáfan, monige eálond blissiaþ Britain equally rejoicing in his belief, many isles shall rejoice; congrātŭlante in fide ejus Brittania, lætentur insŭlæ multæ. Bd. 5, 24; S. 647, 14. efen-blissian