The word Grieful is misspelled against Griefful, an adjective meaning "Full of grief or sorrow."
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Griefful has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Grie & ul which should not be misspelled with single 'F'
Wrong Spelling:  Grie-f-ul 
Correct Spelling:  Grie-ff-ul 
Check more misspelled words of Griefful to spell it correct.