Select the most appropriate one-word substitution for the given group of words

A mild expression substituted for an offensive one

Euphemism

The most appropriate one-word substitution for the given group of words is euphemism.

• Euphemism means a mild or indirect word or expression substituted for one that is considered to be too harsh or offensive.
• Tolerant means willing to allow the existence of opinions or behaviors that one dislikes or disagrees with.
• Optimistic means having a hopeful and confident outlook on the future.
• Diatribe means a bitter and prolonged verbal attack.