Pecavi or Peccavi: How To spell?
The word Pecavi is misspelled against Peccavi, a noun meaning "I have sinned; -- used colloquially to express confession or acknowledgment of an offense."
Peccavi has double "cc" is mispronounced as "c"Remember double 'CC' in between the strings Pe & avi which should not be misspelled with single 'C'
Wrong Spelling:  Pe-c-avi  Correct Spelling:  Pe-cc-avi 
Find more wrongly spelled words of Peccavi to spell it well.