Apoggiatura or Appoggiatura: How To spell?
The word Apoggiatura is misspelled against Appoggiatura, a noun meaning "A passing tone preceding an essential tone, and borrowing the time it occupies from that; a short auxiliary or grace note one degree above or below the principal note unless it be of the same harmony; -- generally indicated by a note of smaller size, as in the illustration above. It forms no essential part of the harmony."
Appoggiatura has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings a & oggiatura which should not be misspelled with single 'P'
Wrong Spelling:  a-p-oggiatura  Correct Spelling:  a-pp-oggiatura 
Check more misspelled words of Appoggiatura to spell it correct.