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