Dictionary entry

χείμμαρος

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

χείμμαρος (shortened form of the more usual -οος, Attic contr., -ους), -ον

(< χεῖμα, ῥέω) [in LXX chiefly for נַחַל;]

winter-flowing; as subst., ὁ χ. (sc. ποταμός), a torrent: Jo 18:1.†