Probably from eiko (through the idea of failure); idly, i.e. Without reason (or effect)


without a cause, (in) vain(-ly).


see GREEK eiko

Textus Receptus Greek Text

eikh
Matt 5:22, Rom 13:4, 1 Cor 15:2, Gal 3:4, Gal 3:4, Gal 4:11, Col 2:18