Unskilful or Unskillful: How To spell?
The word Unskilful is misspelled against Unskillful, an adjective meaning "Lacking discernment; injudicious; ignorant."
Unskillful has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings unski & ful which should not be misspelled with single 'L'
Wrong Spelling:  unski-l-ful  Correct Spelling:  unski-ll-ful 
Check more misspelled words of Unskillful to spell it correct.