Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αθεσίαν rebellion LXX.Jer.20.8
αθεσία their rebellion LXX.Dan.9.7

Liddell-Scott-Jones

ἀθεσία (athesia) rebellion G:N-F

ἀθεσία, ,

faithlessness, fickleness, [LXX+2nd c.BC+]

LSJ Scripture Refs: LXX.Jer.20.8