Efen-wyrhta

According to the Old English Dictionary:

an;

efen-wyrhta

m. A fellow worker; co-opĕrātor :-- Com he to Róme mid hys efenwyrhtan and geféran ðæs ylcan weorces Ceólferþ vēnit Rōmam cum co-opĕrātōre ac sŏcio ejusdem opĕris Ceolfrido, Bd. 4, 18; S. 586, 28. efen-wyrhta