G4845–συμπληρόω–sumplēroō

But as they sailed, he fell asleep. A wind storm came down on the lake, and they were taking on dangerous amounts of water.

συνεπληροῦντο suneplērounto “they were being swamped”

It came to pass, when the days were near that he should be taken up, he intently set his face to go to Jerusalem,

συμπληροῦσθαι sumplērousthai “completing”

Now when the day of Pentecost had come, they were all with one accord in one place.

συμπληροῦσθαι sumplērousthai “arriving of”