Iniritable or Inirritable: How To spell?
The word Iniritable is misspelled against Inirritable, an adjective meaning "Not irritable; esp. (Physiol.), incapable of being stimulated to action, as a muscle."
Inirritable has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings ini & itable which should not be misspelled with single 'R'
Wrong Spelling:  ini-r-itable  Correct Spelling:  ini-rr-itable 
Find more wrongly spelled words of Inirritable to spell it well.