G4845–συμπληρόω–sumplēroō

But as they sailed he fell asleep: and there came down a storm of wind on the lake; and they were filling [supplied: with water], and were in jeopardy.

συνεπληροῦντο suneplērounto “they were being swamped”

And it came to pass, when the days were well-nigh come that he should be received up, he stedfastly set his face to go to Jerusalem,

συμπληροῦσθαι sumplērousthai “completing”

And when the day of Pentecost was now come, they were all together in one place.

συμπληροῦσθαι sumplērousthai “arriving of”