Ilapsed or Illapsed: How To spell?

The word Ilapsed is misspelled against Illapsed, which is past tense of "Illapse"

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