What term describes language that is intended to persuade or affect an audience, often insincerely?

The term that best describes language intended to persuade or affect an audience, often insincerely, is "rhetorical." Rhetorical language is specifically designed to influence an audience's emotions or thoughts, frequently using techniques that may exaggerate or manipulate sentiments rather than presenting straightforward or factual information. This can include the use of emotive language, figurative speech, or misleading implications. The key characteristic of rhetorical language is its aim to persuade, regardless of the sincerity of the message.

While "persuasive" might seem like a suitable choice, it does not inherently carry the connotation of insincerity that "rhetorical" does. "Casual" refers to informal language and does not imply any intention to persuade. "Descriptive," on the other hand, pertains to detailing or painting a picture with words and lacks an intent to manipulate or influence, focusing instead on conveying information as it is. Therefore, "rhetorical" accurately captures the essence of language that seeks to persuade while potentially being insincere.