ἐφύω
From LSJ
γραμματική ἐστιν ἐμπειρία τῶν παρὰ ποιηταῖς τε καὶ συγγραφεῦσιν ὡς ἐπὶ τὸ πολὺ λεγομένων → grammar is a practical knowledge of the usage of poets and writers of prose
English (LSJ)
[ῡ],
A rain upon: impers. ἐφύει, c. dat., Thphr.HP4.14.8, etc.: abs., it rains after, Id.CP6.17.7:—pf. part. Pass. ἐφυσμένος exposed to rain, X.Cyn.9.5.