Nouns whose genitive singular ends in -ī belong to the SECOND DECLENSION. To find the stem of any Latin noun, remove the ending from the genitive singular form. DOMINĪ LIBRĪ -Ī -Ī DOMIN- LIBR- • Masculine nouns of the second declension have a nominative singular ending in -us or -r. Singular 2nd declension endings stem + ending Nominative -us → dominus the master Genitive ī → dominī of the master, master’s Dative -ō → dominō to / for the master Accusative
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