n. pl. pec·ca·dil·loes or pec·ca·dil·los
A small sin or fault.
[Spanish pecadillo, diminutive of pecado, sin, and Italian peccadiglio, diminutive of peccato, sin, both from Latin peccātum, from neuter of peccātus, past participle of peccāre, to sin; see ped- in the Appendix of Indo-European roots.]
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