The word Feretto is misspelled against Ferretto, a noun meaning "Copper sulphide, used to color glass."
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Ferretto has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings fe & etto which should not be misspelled with single 'R'
Wrong Spelling:  fe-r-etto 
Correct Spelling:  fe-rr-etto 
Find more incorrect spellings of Ferretto to spell right way.