διά-δῠσις · dia-dysis — LSJ
passing through, passage, evasions, escape from
passing through, passage, ἐς τὼς πόρως Ti.Locr. 100e, cf. Thphr. Od. 50: metaph. in pl., evasions, τῶν ἀδικημάτων, i.e. escape from the consequences of crimes, D. 24.139, cf. 94, Plu. Dem. 6: abs., Lib. Or. 18.32.
II passages, galleries, subterranean channel
in pl., passages, galleries, in mines, etc., D.S. 5.36: sg., prob.l. in Aen.Tact. 24.5; subterranean channel, Demetr.Sceps. ap. Str. 13.1.43.