Ge-firenian
Bosworth & Toller Anglo-Saxon Old English Dictionary - ge-firenian
According to the Old English Dictionary:
-firnian;
- ge-firenian
- p. ode; pp. od To sin; peccāre :-- We gefirenodon mid fæderum úrum peccāvĭmus cum patrĭbus nostris, Ps. Spl. C. 105, 6. Ic gefirnode I sinned, St. And. 10, 19 : Mt. Kmbl. Rush. 27, 4.