Declinazione
Declinazione is the set of inflectional endings that mark grammatical category such as case, number and, in some languages, gender for nouns, adjectives and pronouns. The term, from Latin declinatio, describes how a word’s form changes within a paradigm to reflect its syntactic function in a sentence. In many languages with declensional morphology, each noun or pronoun belongs to a declension or to a class of endings, and correspondingly its forms vary across cases and numbers.
In languages with rich case systems, declension paradigms specify distinct endings for nominative, genitive, dative, accusative,
Italian offers a modern contrast: nouns show gender and number but largely lack a productive case system