The word Iritancy is misspelled against Irritancy, meaning "The quality of producing vexation."
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Irritancy has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings i & itancy which should not be misspelled with single 'R'
Wrong Spelling:  i-r-itancy 
Correct Spelling:  i-rr-itancy 
Find more wrongly spelled words of Irritancy to spell it well.