Be-bíwan (?)

According to the Old English Dictionary:

be-bíwan (?)

to rub over:--Þá wæs sóht, hwǽr se lǽce wǽre, þe cúþe wyrtgemang wyrcan, ꝥ sé mihte hine (the dead man) besmyrwian and bebyrwan (-býwan?) cum medicus atque pigmentorius ad aperiendum eum atque condiendum esset quaesitus, Gr. D. 318, 3. be-biwan