G. munc n. and adj. “shut mouth, silence, secretiveness; (adj.) mum” (Category: Quiet)
A noun for a “shut mouth, silence, secretiveness” in the Gnomish Lexicon of the 1910s based on mug- “keep silent” (GL/58). It was also used as an adjective meaning “mum”.
Reference ✧ GL/58 ✧ “shut mouth, silence, secretiveness; (aj.) mum”