Mutering or Muttering: How To spell?

The word Mutering is misspelled against Muttering, which is present continuous of "Mutter"

Muttering has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings mu & ering which should not be misspelled with single 'T'
Wrong Spelling: mu-t-ering
Correct Spelling: mu-tt-ering
Check more misspelled words of Muttering to spell it correct.