Dictionary entry

ἐκούσιος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

ἐκούσιος, -ον

(< έκών), [in LXX chiefly for נְדָבָה, as Nu 15:3 (κατ’ ἑ.);]

usually of actions, voluntary: κατὰ ἑ., of free will (Lft., in l), Phm 14.†