Dictionary entry

ἐκπετάννυμι

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

ἐκ-πετάννυμι

[in LXX chiefly for פָּרַשׂ, as Is 65:2 (hithp.);]

to spread out (as a sail), stretch forth: Ro 10:21(LXX).†