Mum or Mumm: How To spell?
The word Mum is misspelled against Mumm, a verb meaning "To sport or make diversion in a mask or disguise; to mask."
Mumm has double 'mm' in the end mispronounced as 'm'Remember double 'MM' appears in the end of this word which should not be misspelled with single 'M'
Wrong Spelling:  mu-m  Correct Spelling:  mu-mm 
Check more misspelled words of Mumm to spell it correct.