Ask at the forum if you have an Ancient or Modern Greek query!
Ἰχθύς ἐκ τῆς κεφαλῆς ὄζειν ἄρχεται → The fish stinks from the head
ἰχνεύω, ἐξιστορέω, ἀνακρίνω, ἐρευνάω