προπιστόομαι
From LSJ
τὸ ἓν καὶ τὸ ὂν πολλαχῶς λέγεται → the term being and the term one are used in many ways, one and being have various meanings, one and being have many senses
English (LSJ)
Pass., to be made credible before, pf. προπεπίστωμαι S.E.P.1.116, M.8.122,261; ἐκ φαινομένου π. τὸ ἄδηλον ib.62.
Greek (Liddell-Scott)
προπιστόομαι: γίνομαι πιστευτὸς πρότερον, πρκμ. προπεπίστωμαι Σέξτ. Ἐμπ. π. Π. 1. 116, π. Μ. 8. 62, 122, 261.