Answer:
"Releasing" as it is used in the book The Giver by Lois Lowry, is something that the society he lives in does with the elders after they have reached a certain age. The citizens are told that they go somewhere else, but in reality the patients are given a serum which in turn kills them silently.
Explanation:
The Jews Hermann and Auguste van Pels with their son Peter,
Fritz Pfeffer and the Frank family were the folk hiding in the Secret Annexe.
They stayed inside, never leaving. They kept completely silent and keep the
curtains drawn. They have a ritual in the morning, the afternoon and evening contingent to the working schedules of the warehousemen to keep the laborers from discovering them.
This is more of an opinion than fact