Where does “declensionism” come from?

declensionism (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.

declensionism (English): A belief in a declining trend in a history

Definitions

  1. A belief in a declining trend in a history

Ancestry of “declensionism”, step by step

declensionism traces back through two separate lines of ancestry.

via English declension

StepLanguageWordMeaning
1EnglishdeclensionA falling off, decay or descent; The act of...
2Middle EnglishdeclinsonAn inflectional class; a nominal declension or verbal conjugation
3Middle Frenchdeclinaison
4Latindēclīnātiōdeclination
5Latin-ātiō
6Latin-tiōtion, -ation, -ing
7Latindissertātiō(spoken) dissertation, discourse, disquisition
8Latindissertusarranged, disposed; explained
9Latindissereresecond-person singular future passive indicative...
10Latindis-asunder, apart, in two; reversal, removal;...
11Latincalceusshoe
12Latincalxlimestone; chalk; the finish line
13Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-
declensionism — Etymology, Origin & Word History | Etymology Explorer