Liddell-Scott-Jones

συννέφω (sunnephō) to collect clouds together ^G:V

συννέφω-ω,

perfect συννένοφα:— collect clouds, Ζεὺς ξυννέφει [συννέφωει">Refs 5th c.BC+], it is cloudy, εἰ συννέφωει, εἰκὸς ὁ̄σαι [Refs 5th c.BC+]

__2 transitive, συννεφεῖν (to be read -νέφειν) νεφέλας ἐπὶ τὴν γῆν [LXX]
__II metaphorically of persons, συννέφωουσαν ὄμματα wearing a dark and gloomy look, [Refs 5th c.BC+]
__II.2 to be under a cloud, in adversity, opposed to εὐτυχεῖν, [Refs 5th c.BC+]

_{LSJ Scripture Refs: LXX.Gen.9.14}