Disasiduity or Disassiduity: How To spell?
The word Disasiduity is misspelled against Disassiduity, a noun meaning "Want of assiduity or care."
Disassiduity has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings disa & iduity which should not be misspelled with single 'S'
Wrong Spelling:  disa-s-iduity  Correct Spelling:  disa-ss-iduity 
Check more misspelled words of Disassiduity to spell it correct.