Ge-wearnian

According to the Old English Dictionary:

ge-wearnian

p. ode; pp. od To guard against, avoid :-- Hwǽr him wǽre fultum to sécanne to gewearnienne swá réðre hergunge ubi quærendum est præsidium ad evitandas tam feras inruptiones, Bd. 1, 14; S. 482, 37. ge-wearnian