play'-tho,pleh'-o, A prolonged form of a primary word πλέω pleō (which appears only as an alternate in certain tenses and in the reduplicated form of πίμπλημι pimplēmi to “fill ” (literally or figuratively [imbue, influence, supply ]); specifically to fulfil (time)
KJV Usage: accomplish, full (. . . come), furnish.
G4126 πλέω, πλεύωπλέω, πλεύω
The first is another form for the second which is used as an alternate in certain tenses; probably a form of G4150 (through the idea of plunging through the water); to pass in a vessel