Euphemisms are substitution for words or expressions which might be interpreted as unpleasant, shameful, or oversharing. The Community within The Giver uses these carefully coined phrases in order to "protect" its members from what they perceive to be troublesome realities. Let's examine some of these euphemisms...
First off, the term "Community" euphemistically gives those who live within this world a sense of being secure, protected, and leading meaningful lives, when in actuality they are being strictly monitored and controlled. The Community is actually just an oppressive governing system.
Most of the Community believes that members who are "released" are sent to live in a different place. In reality, this is a euphemism for the strategic killing via lethal injection of those who have become too old or who are being punished for some offense.
When someone is "released," he or she goes "Elsewhere." This ambiguous term is actually just a sugarcoating of death.
"Stirrings" refer to sexual feelings, which are unwanted emotions within the community; "Feelings," as a whole, are undesired and meant to be supressed.
Even people themselves are given euphemistic titles: a woman and man who have been selected to take care of a child are respectively referred to as "Mother" and "Father" despite the lack of biological implication in their parenthood. "Elders" is the euphemism used for those who are in charge of the Community; the term imbues them with a sense of wisdom, knowledge, and good intentions... even if they have not earned or do not possess those qualities.