A mild or indirect expression used instead of a harsh one, such as “passed away” for “died,” is a euphemism.
Euphemisms soften language around subjects that may feel painful, embarrassing, offensive, or socially taboo. “Passed away” makes death sound gentler, while phrases such as “let go” or “between jobs” can soften references to unemployment. Speakers may use euphemisms out of politeness, compassion, discretion, humor, or a desire to avoid direct confrontation.
The word comes from the Greek euphemia, meaning “words of good omen.” Euphemisms are not always harmless: institutions and governments can use them to make violence, discrimination, or other serious actions sound less severe. Their effect depends heavily on context and audience.
A common mix-up is dysphemism, which moves in the opposite direction by replacing a neutral term with a harsher or more offensive one. Hyperbole is deliberate exaggeration, while an idiom is a fixed expression whose meaning cannot always be understood literally; neither definition necessarily involves softening an unpleasant idea.