G1595
ἑκούσιος
voluntary
ἐκούσιος, -ον (έκών), [in LXX chiefly for נְדָבָה, as Num.15:3 (κατ᾽ ἑ) ;] usually of actions, voluntary: κατὰ ἑ., of free will (Lft., in l), Phm 14.† (AS)
The KJV translates G1595 in the following manner:
willingly (2x)
Full Thayer's lexicon entry
ἑκούσιον — hekoúsion
ἑκούσιος, ἑκούσιον (ἑκών), voluntary: κατά ἑκούσιον, of free will, Phm 1:14. (Num 15:3; καθ' ἑκουσιαν, Thucydides 8, 27 — ("The word understood in the one case appears to be τρόπον (Porphyry, de abst. 1, 9 καθ' ἑκούσιον τρόπον, comp. Euripides, Med. 751 ἑκουσίῳ τρόπῳ); in the other, γνώμην so ἑκούσια (doubtful, see Liddell and Scott), ἐξ ἑκουσιας, etc.;" cf. Lobeck, Phryn., p. 4; Lightfoot on Philemon, the passage cited; cf. Winer's Grammar, 463 (432)).)
1 occurrence