Ge-biterian

According to the Old English Dictionary:

ge-biterian

p. ode; pp. od [ge-, biterian to embitter] To make bitter; amarefacere :-- Hí sealdon him gebiterod wín dăbant ei myrrhātum vīnum [amarefactum vīnum, vīnum myrrha imbūtum], Mk. Bos. 15, 23. ge-biterian