The word Gufaw is misspelled against Guffaw, a noun meaning "A loud burst of laughter; a horse laugh."
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Guffaw has double "ff" is mispronounced as "f"
Remember double 'FF' in between the strings Gu & aw which should not be misspelled with single 'F'
Wrong Spelling:  Gu-f-aw 
Correct Spelling:  Gu-ff-aw 
Check more misspelled words of Guffaw to spell it correct.