Where does “indifferency” come from?

indifferency (English) comes from Latin indifferentia, from Latin indifferens, from Latin differēns, from Latin differre, from Latin differo, from Latin dis-, from Latin calceus, from Latin calx — small stone, pebble; gravel, rubble.

indifferency (English): Impartiality, fairness, disinterestedness; A lack...

Definitions

Impartiality, fairness, disinterestedness; A lack...

Ancestry of “indifferency”, step by step

Step	Language	Word	Meaning
1	Latin	indifferentia	similarity, equivalence; nominative neuter plural...
2	Latin	indifferens	indifferent; neither good nor bad; unconcerned
3	Latin	differēns	spreading, scattering, dispersing, separating
4	Latin	differre	present active infinitive of differō
5	Latin	differo	I carry different ways, spread, scatter,...
6	Latin	dis-	asunder, apart, in two; reversal, removal;...
7	Latin	calceus	shoe
8	Latin	calx	limestone; chalk; the finish line
9	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin dis- →Every word from Latin calx →