Etymology

Always derived from ON, cp. OIcel munnr 'mouth' with assimilation of an original fricative < PGmc *munþaz 'mouth', cp. Go munþs, OFris mund, mond, OS mūth, OHG mund and OE mūð 'mouth, opening, door, gate'.

PGmc Ancestor

*munþaz

Proposed ON Etymon (OIcel representative)

muðr, munnr 'mouth'
(ONP munnr (sb.))

Other Scandinavian Reflexes

Far munnur, Icel munnur, Norw munn, Dan mund, Sw mun, munn

OE Cognate

mūð 'mouth, opening, door, gate'

Phonological and morphological markers

ON consonant cluster assimilation

Summary category

A1*bc

Attestation

This is the first of only a handful of attestations from ME texts in OED and MED, mostly from the N and E. However, it also occurs as an element in Yks. place-names. e.g. Dalemun (see EPNE) and survives in modern N and Sc dial (see OED, EDD)

Occurrences in the Gersum Corpus

Pat 44

Bibliography

MED mum (n.) , OED3 mun (n.1) , HTOED , EDD mun (sb.1), Bj. 172, de Vries munnr, muðr, Mag. munnur, Orel *munþaz, Kroonen *munþa-, AEW mūð, EPNE munnr