n u and o, m. (Lat. peccatum) in O.Ir. u-st. (on analogy of vn. in -ad, Thurn, Thurn. Hdb. § 915 ): n s. peccad, Wb. 3c27 et pass. peccath, 9c19 . pecad, Ml. 32c17 . g s. in phectho , Wb. 14d27 ; cf. 3c14 , 38 , etc., Ml. 53b21 , 60b19 , 126b6 . pecctho, Wb. 27d10 . in phectha , Wb. 9d5 , cf. 29a28 , 31c22 (pecctha); Ml. 54a5 et pass. n p. in pecthi , Wb. 25b9 , cf. 4a8 , Ml. 32c15 , 46b28 , 71c12 (peccthi). pecthai, 98c6 . pecdae, Wb. 33b8 . pectha, 2a6 . a p. pecthu, Wb. 3c21 , 9d5 , 13b19 ; Ml. 47b7 , 58c18 . g p. pecthae, Ml. 32b18 , 51c21 , 98c6 . Tur. 58a . pecthe, Tur. 45 . d p. pecthaib, Ml. 46b26 ; -pecthib, 33d12 .

In Mid.Ir. also commonly treated as o-st., but both forms of declension persist side by side down to mod. period. In PH the usual g s. is peccaid, but pectha, pecda also occur: d s. pecud, PH 4826 (generally peccad); n p. pectha, -da (peccaid only twice); a p. pectha, -da. Occas. -th-(-d-) is omitted in obl. cases. pecadh (m., g s. n p. -aidh), IGT Dec. § 17.14 . g p. a n-íc a pecthadh , ex. 728 (proscribed as incorrect).

Sin, both in abstr. sense and concrete (esp. in pl.), a sin, kind of sin, sinful act: pecad a pec[c]ato , Corm. Y 1044 . is hé in peccath for arele .i. fornicatio , Wb. 9c19 . fo mám pectho, 3c38 . pecthi collnidi carnal sins, 4a8 . is airi asberar lex peccati hóre donadbat pecthu, 3c21 . is huilliu in trocaire . . . indate in pecthai, Ml. 98c6 . dilgud a pecthe ndoib, Tur. 45 ( Thes. ii 487 ). cura dichuirer mo pecda, Gild. Lor. 261 . ar demnaib, ar pheccdaib . . . ron-sóera do spirut, Thes. ii 359.7 . combart cen peccad cen col, LU 10863 ( IT i 133.4 ). peccad marbtha mortal sin, PH 7321 . hi peccad bunad-géinnti original sin, 3909 . peccad na drúisi, 7442 . tar cend na ndoine dorochratar i peccad, 2087 . plaig pecda the plague of sin, Ériu iv 156.5 (pectha v.l.). coros-bréc dia póic phecda her sinful kiss, Metr. Dinds. iv 44.33 (g s. as attrib.). ni ful[n]giut cethra pecai in duine beasts are not subject to the sins of man, ZCP viii 104.7 (B. na f.). ní pecad la nech dhibh pecad . . . do pecthaib na mban none of them counts any sin committed with women as sin, Marco P. 174 . tar eis cinaid [leg. cinad] no pectha icthar pennait, Anecd. v 3.3 , cf. Alex. 855 . ni etarscarann a menma ria pecthaib ┐ duailchib, Lism. L. 701 . peaca marbhtha . . . cinn na bpeaca eile iad, Dán Dé xxxi 32 . seacht bpeacaidh dhleaghmuid do dhíol, ib. 33 . má tá fúd feacadh d'iarmuirt if sin remain in thee, xviii 3 . na peacaidh ghníomhacha . . . na peacaidh doní ré faill (= sins of commission and of omission). TSh. 4089 . na peachaidhe marbhthacha, 7050 . foluigh h'aghaidh óm pheacuighibh-si, Psalms li 9 . pecadh na sinnser original sin, Parrth. Anma 236.12 (= Luc. Fid. 151.9 ). na pectha donither a n-aghaidh an sbiorad naoimh, 142.10 (= na pecadh, Luc. Fid. 155.12 ). a úain De thogbhas pecadha an domhain, 293.11 .