Muter or Mutter: How To spell?
The word Muter is misspelled against Mutter, a noun meaning "Repressed or obscure utterance."
Mutter has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings mu & er which should not be misspelled with single 'T'
Wrong Spelling:  mu-t-er  Correct Spelling:  mu-tt-er 
Check more misspelled words of Mutter to spell it correct.