Ilapse or Illapse: How To spell?

The word Ilapse is misspelled against Illapse, a verb meaning "A gliding in; an immisson or entrance of one thing into another; also, a sudden descent or attack."

Illapse has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings i & apse which should not be misspelled with single 'L'
Wrong Spelling:  i-l-apse 
Correct Spelling:  i-ll-apse 
Explore spell check of Illapse to spell without errors.