Trisylable or Trisyllable: How To spell?
The word Trisylable is misspelled against Trisyllable, a noun meaning "A word consisting of three syllables only; as, a-ven-ger."
Trisyllable has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings trisy & able which should not be misspelled with single 'L'
Wrong Spelling:  trisy-l-able  Correct Spelling:  trisy-ll-able 
Find more wrongly spelled words of Trisyllable to spell it well.