1. Dialect leveling: This is the process where the differences between dialects of a language become less pronounced over time. It can happen due to increased contact between speakers of different dialects, social pressures to conform to a standard dialect, or other factors.
2. Dialect suppression: This refers to the deliberate silencing or suppression of a dialect, often for political or social reasons. It can involve policies that discourage the use of non-standard dialects in education or the media, or societal pressures that lead individuals to abandon their native dialect in favor of a perceived "better" one.
3. Dialect loss: This occurs when a dialect ceases to be spoken by any native speakers. This can happen due to various factors, such as the death of speakers, migration, or language shift, where speakers of a dialect switch to a different language.
4. Omission of dialect features: This is a broader term that refers to the absence of specific features that are characteristic of a particular dialect in a speaker's language. This could be intentional, like when a speaker tries to sound more neutral or formal, or unintentional, like when a speaker is not fully fluent in a dialect.
5. Omission of dialect-specific words: This is a specific case of omission of dialect features where speakers leave out words that are unique to a particular dialect and instead use more general or standard language.
To understand what you're referring to, please provide more context. For example, are you talking about:
* A specific situation where a speaker chooses not to use a particular dialect feature?
* A larger trend in language change where certain dialect features are disappearing?
* A policy or practice that aims to reduce dialect diversity?
Once you provide more context, I can give you a more accurate and helpful answer.