Origin: Latin suffix -sion
Declension has 5 different meanings across 1 category:
the inflection of nouns and pronouns and adjectives in Indo-European languages
process of changing to an inferior state
a downward slope or bend
a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms
"the first declension in Latin"
A falling off, decay or descent.
The word comes from the Latin dēclīnātiō, meaning "a bending down." It entered English through Middle French in the late Middle English period as a doublet of the word declination.