acrasia
Lack of self-control; excess, intemperance; also, irregular or unruly behaviour.
archaic, rare, uncountable
Him fortuned (hard fortune ye may gheſſe) / To come, vvhere vile Acraſia does vvonne [live], / Acraſia a falſe enchauntereſſe, / That many errant knightes hath fovvle fordonne: […]
Where it comes from
Learned borrowing from Late Latin acrasia (“lack of temperance”), and from its etymon Ancient Greek ᾰ̓κρᾱσῐ́ᾱ (ăkrāsĭ́ā, “bad mixture”), from ἄκρᾱτος (ákrātos, “pure, unmixed, untempered; of a person: intemperate, violent”) + -ῐ́ᾱ (-ĭ́ā, suffix forming feminine abstract nouns). Ἄκρᾱτος (Ákrātos) is derived from ᾰ̓- (ă-, “privative”, prefix) + κερᾰ́ννῡμῐ (kerắnnūmĭ, “to mix, blend; to cool or temper by mixing”) (ultimately from Proto-Indo-European *ḱerh₂- (“to mix”)) + -τος (-tos, suffix forming adjectives). Doublet of acrasy.
Adapted from the Wiktionary entry acrasia (CC BY-SA 4.0).