Medially and finally f remains in cloff, nefe, lufe, laif.
Medially and finally f > v in: nieve, nevin, rive, lave, crave.
O. N. f > th in scarth (O. N. skarfr).
An epenthetic f appears in unrufe (v?).
s.
O. N. s regularly remains s.
s > ch in chyngill (?).
sk.
O. N. sk = sk initially medially and finally: skar, sker, skewit, skill, skugg, skrech, skant, scait, scool, scratch, scarth, skait, skail, scud, scudler, script, skyle, skeigh, busk, bask (dry), harsk, harskness, forjeskit, mensk(?).
O. N. sk > sh finally in dash (?).