n o, n. or m. (Lat. infernus via a British form, Ériu xxxiv 62 n. 121 ) Somet. ithfern, ithfren. ifreann ifrann ifearn ifarn, IGT Decl. § 11.36 .

hell, the infernal regions, Hades: donaib pecthachaib i n-ifurnn, Wb. 13c26 . carcar ifirnn, 32c13 . bándáe iffirnn gl. Parcas, Sg. 53b1 . do dia iffirnn gl. Orco, 41b12 . a conguin bís foraib tantum i n-iffiurnn, Ml. 23a5 . ni molat dia i n-ifurnn, 130b6 . ar iffurnd i n-Albu ómun 'for fear of Hell he went to Scotland ' LU 1091 (ACC) , ZCP xxxix 79 . rom-ṡóerae, á Íssu, | ar iffern ngér, Fél. Ep. 538. co n-oslaictea dorus ithfrin, Laws i 6.13 . muinter thalman iss iffeirnn, SR 8256. píana écsamla iffrind, LU 1951. iadad iffirn tria bith sír forru, 2413 . roindis co rucad an iffernd ┐ co rigṡuide in brithemon, Lat. Lives 91.13 . iffearn gl. Tartarus, Ir. Gl. 519. iffern gl. infernus, 520 . Sattan, airchindech iffirn, PH 3818. co ndechaid a ainim a n-ithfern, Lism. L. 430. go hadhbhaidh Iofruinn, DDána 35 § 13. ní neamhchóir dúana do dheilbh | do chreachthóir úamha ifirn, IGT Decl. ex. 1312. do bhí an cagadh os aird ann | an mad[an] do airg iofrann, ex. 761 . ifreann íochtarach nó flaitheas Dé, TSh. 4327. fuacht nó teas i dtigh ifeirn, 6710 . Occurs in pl. : dia tarlaichthe [aille a delba in Choimded] isna ifernaib, imsoifitis iffirn ... i taitnemh richidh, Ériu ii 142 § 157. is ferg Dé fhiches isna iffernaibh, § 152 .