Diagonaly or Diagonally: How To spell?
The word Diagonaly is misspelled against Diagonally, an adverb meaning "In a diagonal direction."
Diagonally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings diagona & y which should not be misspelled with single 'L'
Wrong Spelling:  diagona-l-y  Correct Spelling:  diagona-ll-y 
Find more incorrect spellings of Diagonally to spell right way.