Mumying or Mummying: How To spell?
The word Mumying is misspelled against Mummying, which is present continuous of "Mummy"
Mummying has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings mu & ying which should not be misspelled with single 'M'
Wrong Spelling:  mu-m-ying  Correct Spelling:  mu-mm-ying 
Check more misspelled words of Mummying to spell it correct.