G4845–συμπληρόω–sumplēroō

And as they sailed, he fell asleep; and a sudden squall of wind came down on the lake, and they were filled [supplied: with water], and were in danger;

συνεπληροῦντο suneplērounto “they were being swamped”

And it came to pass when the days of his receiving up were fulfilled, that *he* stedfastly set his face to go to Jerusalem.

συμπληροῦσθαι sumplērousthai “completing”

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

συμπληροῦσθαι sumplērousthai “arriving of”