πλευστέον
From LSJ
τὸ γὰρ μυστήριον ἤδη ἐνεργεῖται τῆς ἀνομίας· μόνον ὁ κατέχων ἄρτι ἕως ἐκ μέσου γένηται. (2Thess 2:7) → For the mystery of lawlessness is already at work — just at work until the one who is now constraining it is taken out.
English (LSJ)
or πλευστέα, (πλέω)
A one must sail, πλευστέα Ar.Lys.411; πλευστέον . . αὐτοῖς ἐμβᾶσι D.4.16, cf. Them.Or.27.337c.