The Collaborative International Dictionary
Mummed
Mumm \Mumm\, v. i. [imp. & p. p. Mummed; p. pr. & vb. n. Mumming.] [D. mimmen to mask, mom a mask; akin to G. mumme disguise; prob. of imitative origin, and akin to E. mum, mumble, in allusion to the indistinctness of speech occasioned by talking from behind a mask. Cf. Mumble, Mummery.] To sport or make diversion in a mask or disguise; to mask.
With mumming and with masking all around.
--Spenser.
Wiktionary
mummed
vb. (en-pastmum)
WordNet
mummed
See mum
mum