Efen-hleóðor

According to the Old English Dictionary:

-hleóðres;

efen-hleóðor

m. A sounding together, concordance of voices or sounds, united voice; concentus :-- Bletsiaþ Bregu sélestan efenhleóðre ðus they bless the most excellent Lord thus with united voice, Exon. 64 b; Th. 239, 15; Ph. 621. efen-hleoðor