grunnu* ‘the shallows’: Grunnum (m. dat. pl.), apparently a scribal error, has been emended to grunnu (m. acc. pl.) to agree with leikna ‘swept’ (m. acc. pl.). Kock (NN §1131) emends to grunna, claiming that this noun is an a-stem. However, AEW: grunnr gives the etymology grunnr < *grunþu (u-stem).