Felon
WordNet
noun
(1) Someone who has committed (or been legally convicted of) a crime
(2) A purulent infection at the end of a finger or toe in the area surrounding the nail
WiktionaryText
Etymology
From felun, feloun from feloun from felun, obl. case of fel "traitor, wretch", of origin from *fillo "wicked person, traitor". Akin to fillian "to whip, punish", fillen "to whip, beat"