de·clen·sion
noun/dɪˈklenʃn/
/dɪˈklenʃn/
(grammar)- [countable] (in some languages) a set of nouns, adjectives or pronouns that change in the same way to show case, number and gender
（名词、形容词或代词显示格、数、性的）变格 - [uncountable] (in some languages) the way in which some sets of nouns, adjectives and pronouns change their form or endings to show case, number or gender
（名词、形容词和代词显示性、数、格的）词形变化
Word Originlate Middle English declinson, from Old French declinaison, from decliner ‘to decline’. The change in the ending was probably due to association with words such as ascension.