Dulsome or Dullsome: How To spell?

The word Dulsome is misspelled against Dullsome, an adjective meaning "Dull."

Dullsome has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings du & some which should not be misspelled with single 'L'
Wrong Spelling:  du-l-some 
Correct Spelling:  du-ll-some 
Check more misspelled words of Dullsome to spell it correct.