Mutered or Muttered: How To spell?

The word Mutered is misspelled against Muttered, which is past tense of "Mutter"

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