Solu

According to the Old English Dictionary:

an, e (?);

solu

f. A sole, a sandal:--Solen soleae, Wrt. Voc. i. 26, 18. [Goth. sulja a sandal: O. H. Ger. sola, pl. solun, sola solea, sandallo, planta. From Lat. solea.] solu