Fennig

According to the Old English Dictionary:

fenneg;

fennig

adj. FENNY, marshy, muddy, dirty; pălustris, ulīgĭnōsus, lŭtōsus :-- Fennig æcer ulīgĭnōsus ăger, Ælfc. Gl. 57; Som. 67, 70; Wrt. Voc. 37, 56. Gif sió hond bip fennegu if the hand is dirty, Past. 13, 1; Hat. MS. 16 b, 8. fennig