The word Solfegiare is misspelled against Solfeggiare, a verb meaning "To sol-fa. See Sol-fa, v. i."
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Solfeggiare has double "gg" is mispronounced as "g"
Remember double 'GG' in between the strings solfe & iare which should not be misspelled with single 'G'
Wrong Spelling:  solfe-g-iare 
Correct Spelling:  solfe-gg-iare 
Find more incorrect spellings of Solfeggiare to spell right way.