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