fixture
From LSJ
ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
be a fixture: P. and V. ἱδρῦσθαι (perf. pass. of ἱδρύειν), μένειν.
fixtures (in a house, etc. ), P. κατασκευή, ἡ.