Where does “overindulgency” come from?

overindulgency (English) comes from English indulgency, from Latin indulgentia, from Latin indulgēns, from Latin indulgeo, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

Ancestry of “overindulgency”, step by step

overindulgency traces back through two separate lines of ancestry.

via English indulgency

StepLanguageWordMeaning
1Englishindulgencyindulgence
2Latinindulgentialeniency, concession, pardon; kindness,...
3Latinindulgēnsindulging, indulgent
4Latinindulgeoto be kind or courteous (to); to be inclined (to); give free rein (to)
5Latinīn-un-, non-, not
6Latinînin, at, on, upon, from (space)
7Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
8Proto-Italicenin
9Proto-Indo-Europeanh₁énin

via English over

StepLanguageWordMeaning
1EnglishoverDiscontinued; ended or concluded; Thoroughly;...
2Middle Englishoverriverbank, seashore, brink
3Old Englishōferriverbank, seashore, brink, edge, margin, border
4Proto-West Germanicobarover, above
5Proto-Germanicuberover; over, above
6Proto-Indo-Europeanupérabove; over
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-
Every word from Proto-Indo-European h₁én