MASCULINE FEMININE NEUTER SINGULAR NOM. idoneus idonea idoneum GEN. idonei idoneae idonei DAT. idoneo idoneae idoneo ACC. idoneum idoneam idoneum ABL. idoneo idonea idoneo PLURAL NOM. idonei idoneae idonea GEN. idoneorum idonearum idoneorum DAT. idoneis idoneis idoneis ACC. idoneos idoneas idonea ABL. idoneis idoneis idoneis