The Anglo-Frish nosely narrowloud law is the law in speechlore by which Frish and English lost louds like an -n- or -m- right before an -s- or -th- loud. The other Teutonish tungs have not lost it, other than Low Teutonish somewhat. Liken the following words:
Fore-written Teutonish *tanþ- becomes English tooth, Old Frish tōth (but Low Teutonish Tähn, Dutch tand, Teutonish Zahn).
Fore-written Teutonish *anþara- becomes English other, West Frish oar, East Frish uur, Old Saxon āthar (but Teutonish & Dutch ander- [þ→d]).
Fore-written Teutonish *fimf becomes English five, West Frish fiif, East Frisian fieuw, Dutch vijf, Low German fiev, fief (but Teutonish fünf).
Fore-written Teutonish *samft- becomes English soft, West Frish sêft, Low German sacht, Dutch zacht [ft→xt] (but Teutonish sanft).
Fore-written Teutonish *gans- becomes English goose, West Frish goes, Low German Goos (but Dutch gans, Teutonish Gans).