The word Snifed is misspelled against Sniffed, which is past tense of "Sniff"
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Sniffed has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Sni & ed which should not be misspelled with single 'F'
Wrong Spelling:  Sni-f-ed 
Correct Spelling:  Sni-ff-ed 
Find more wrongly spelled words of Sniffed to spell it well.