ὑδροφαντική
From LSJ
ἔσῃ γὰρ ὡς πετεινοῦ ἀνιπταμένου νεοσσὸς ἀφῃρημένος → for you will be as a nestling taken away from a bird that is flying
English (LSJ)
(sc. τέχνη), ἡ, the art of discovering water, Gp. 2.6.1; also ὑδροφαντικά, τά, ibid.
German (Pape)
[Seite 1174] ἡ, sc. τέχνη, die Kunst, verborgenes Wasser zu entdecken.