Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English declension
English declination (doublet)
Middle English declenson (inherited)
French déclinaison (mention)
Middle French declinaison (derived)
Proto-Indo-European *ḱley- (root)
Latin dēclīnātiō (derived)

English abatement (link)
English declination (doublet)
English declensionism (suffix)
English declensionist (suffix)
English declensional (suffix)
English declense (back-formation)