G4845–συμπληρόω–sumplēroō

and as they are sailing he fell deeply asleep, and there came down a storm of wind to the lake, and they were filling, and were in peril.

συνεπληροῦντο suneplērounto “they were being swamped”

And it came to pass, in the completing of the days of his being taken up, that he fixed his face to go on to Jerusalem,

συμπληροῦσθαι sumplērousthai “completing”

And in the day of the Pentecost being fulfilled, they were all with one accord at the same place,

συμπληροῦσθαι sumplērousthai “arriving of”