Where does “declensional” come from?
declensional (English) comes from English declension, from Middle English declinson, from Middle French declinaison, from Latin dēclīnātiō, from Latin -ātiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.
declensional (English): Pertaining to declension
Ancestry of “declensional”, step by step