Grennian

According to the Old English Dictionary:

grennian

In l. 5 for 'ringentibus,' '55, Lye' substitute 'dissolutis,' '172, 16,' and add: to grunt :-- Grennigan grunnire, Wrt. Voc. ii. 42, 36. [Cf. O. H. Ger. granón grunnire. N. E. D. grin.] grennian