Be-sútian

According to the Old English Dictionary:

be-sútian

p. od To make foul, sordid :-- Besútod obsoletum, i. sordi-rfurn, Germ. 403, 26. [Cf. Mi saule is suti, O. E. Hml. i. 185, 5. Hu swart þing ant hu suti is sunne, Marh. 15, 1. þat suti sunne, H. M. 35, 17.] be-sutian