The word Apall is misspelled against Appall, meaning "To fill with dismay or horror."
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Appall has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings a & all which should not be misspelled with single 'P'
Wrong Spelling:  a-p-all 
Correct Spelling:  a-pp-all 
Browse incorrect spellings of Appall to spell it good.