peaca marfach

== Irish == === Alternative forms === peaca marfa === Noun === peaca marfach m (genitive singular peaca mharfaigh, nominative plural peacaí marfacha) (Roman Catholicism, theology) mortal sin, deadly sin (Roman Catholicism, theology) cardinal sin Synonym: ceannpheaca (humorous) hanging offence (something very bad) === Mutation === === References === Ó Dónaill, Niall (1977), “peaca marfach”, in Foclóir Gaeilge–Béarla [Irish–English Dictionary], Dublin: An Gúm, →ISBN de Bhaldraithe, Tomás (1959), “peaca marfach”, in English-Irish Dictionary, An Gúm “peaca marfach”, in New English-Irish Dictionary, Foras na Gaeilge, 2013–2026