gen. gyrwe; f. Mud, filth, dung :-- Gyr (gyru?, gor, ?? cf. letamen gor, scear[n]. Wrt. Voc. ii. 50, 38), dincge letamen, An. Ox. 4773. Gyrwe fen (the 12th cent. MS. has gurufen) palus, Ælfc. Gr. Z. 60, 10. ¶ giving rise to a local name :-- Æt wire múðan and be Tínan þǽre eá, on ðǽre stówe þe is gecýged on Gyrwum (in loco, oni uocatur In Gyruum (Yarrow)), Bd. 5, 21; Sch. 677, 12. [Cf. O. Frs. gere, ieie filthy wate r.] and next word. gyru