The word Mudying is misspelled against Muddying, which is present continuous of "Muddy"
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Muddying has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings Mu & ying which should not be misspelled with single 'D'
Wrong Spelling:  Mu-d-ying 
Correct Spelling:  Mu-dd-ying 
Check more misspelled words of Muddying to spell it correct.