--> Semidiatessaron has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings semidiate & aron which should not be misspelled with single 'S'
Wrong Spelling:  semidiate-s-aron 
Correct Spelling:  semidiate-ss-aron 
Find more incorrect spellings of Semidiatessaron to spell right way.