--> Hellenistical has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings he & enistical which should not be misspelled with single 'L'
Wrong Spelling:  he-l-enistical 
Correct Spelling:  he-ll-enistical 
Find more wrongly spelled words of Hellenistical to spell it well.