Iresistibly or Irresistibly: How To spell?
The word Iresistibly is misspelled against Irresistibly, an adverb meaning "In an irrestible manner."
Irresistibly has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings i & esistibly which should not be misspelled with single 'R'
Wrong Spelling:  i-r-esistibly  Correct Spelling:  i-rr-esistibly 
Find more wrongly spelled words of Irresistibly to spell it well.