sumpleroo denotes reaching completion, whether of appointed days or of people being overwhelmed by water.

The prevailing use concerns a span of days coming to its completion, while one occurrence describes people becoming filled amid a storm on the lake.

1. Days reaching their completion · dominant

   The present passive infinitive is used of a day or days approaching their stated completion: in Acts 2:1 the APB renders the day of Pentecost as “being fulfilled,” and in Luke 9:51 it similarly renders the days of his ascension as “being fulfilled.”

   Acts 2:1Luke 9:51
2. People becoming filled in danger · occasional

   In Luke 8:23, the imperfect passive plural occurs as a storm descends on the lake; the APB renders the people as “being filled” and in danger.

   Luke 8:23

In the Anselm Project Bible: The APB uses “being fulfilled” for the day and days in Acts 2:1 and Luke 9:51, but “being filled” in the storm scene of Luke 8:23. These renderings confirm the clauses rather than fix an English equivalent for every occurrence.