Never heard of this word before:
peccadillo
NOUN:
pl. pec?ca?dil?loes or pec?ca?dil?los
A small sin or fault.———————————————-
ETYMOLOGY:
Spanish pecadillo, diminutive of pecado, sin,, and Italian peccadiglio, diminutive of peccato, sin both from Latin pecctum, from neuter of pecctus past participle of peccre, to sin; see ped- in Indo-European roots
There you go, you can’t say I never teach you anything.