Adjectives are words to describe nouns, and so they agree with the nouns. Agreeing means that they match the noun they refer to in three ways: gender, number, and case. SINGULAR Like Servus Like Puella Like Bellum Nominative bon-us bon-a bon-um Vocative bon-e bon-a bon-um Accusative bon-um bon-am bon-um Genitive bon-i bon-ae bon-i Dative bon-o bon-ae bon-o Ablative bon-o bon-a bon-o PLURAL Nominative bon-i bon-ae bon-a Vocative bon-i bon-ae bon-a Accusative bon-os bon-as bon-a Genitive bon-orum bon-arum bon-orum Dative bon-is bon-is bon-is Ablative bon-is bon-is bon-is SINGULAR Like Rex Like Rex Like Opus Nominative trist-is trist-is trist-e Vocative trist-is trist-is trist-e Accusative trist-em trist-em trist-e Genitive trist-i trist-i trist-is Dative trist-is trist-is trist-i Ablative trist-i trist-i trist-i PLURAL Nominative trist-es trist-es trist-ia Vocative trist-es trist-es trist-ia Accusative trist-es trist-es trist-ia Genitive trist-ium trist-ium trist-ium Dative trist-ibus trist-ibus trist-ibus Ablative trist-ibus trist-ibus trist-ibus Positive Comparative Superlative Notes Normal form of Adjective Stem + ior,-ius Stem + issimus,-a,-um Stem + rimus,-a,-um For adjectives which end with -er. For example: acer-rimus,-a,-um Stem + limus,-a,-um For adjectives which end with -ilis. For example: facil-limus,-a,-um Per/Prae + Adjective