Where does “disunity” come from?

Disunity comes from Middle English dis- combined with unity, ultimately derived from Latin dis- and -itas, which trace to Proto-Indo-European dwóh₁ meaning two.

disunity (English): The lack of unity or cohesion

Definitions

The lack of unity or cohesion

Ancestry of “disunity”, step by step

Step	Language	Word	Meaning
1	English	dis-	reversal or removal; apart; Used as an...
2	Middle English	dis-	dis-, de
3	Old French	des-	de-; dis-
4	Latin	dis-	asunder, apart, in two; reversal, removal;...
5	Latin	calceus	shoe
6	Latin	calx	limestone; chalk; the finish line
7	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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