Mǽr-weg

According to the Old English Dictionary:

es;

mǽr-weg

m. A boundary (?) road :-- On ðone márweg; ondlong ðaes mǽrweges, Cod. Dip. Kmbl. iii. 32, 33. Ondlong ðæs lýtlan weges ðæt hit cymeþ on ðone norþran mǽrweg; ondlong ðæs mǽrweges, 33, 5: 77, 26. [Cf. mearc-weg, 202, 5; but also on piddes meres weg, 77-14.] mær-weg