Where does “double declension” come from?

double declension (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.

double declension (English): The process of declining a noun twice to form a compound grammatical case form; sometimes found in agglutinative languages

Definitions

  1. The process of declining a noun twice to form a compound grammatical case form; sometimes found in agglutinative languages

Ancestry of “double declension”, step by step

double declension 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 doublé

StepLanguageWordMeaning
1EnglishdoubléA compound attack that deceives the opponent's...
2Frenchdoublédouble, brace, pair; double; doublé
3Middle Frenchdouble
4Old Frenchdobledouble
5Latindūplusdouble (twice as much, or as big)
6Proto-Italic*duplosdouble
Every word from Ancient Greek χάλιξ
double declension — Etymology, Origin & Word History | Etymology Explorer