The word Disalowing is misspelled against Disallowing, which is present continuous of "Disallow"
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Disallowing has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings disa & owing which should not be misspelled with single 'L'
Wrong Spelling:  disa-l-owing 
Correct Spelling:  disa-ll-owing 
Find more incorrect spellings of Disallowing to spell right way.