Colloquial (adjective)

1. Characteristic of or appropriate to ordinary or familiar conversation rather than formal speech or writing.
2. Characteristic of or appropriate to spoken language as opposed to writing.

Origin:

Derived from the latin word "colloquium" meaning "a conversation".

Examples:

1. The colloquial language used in the novel made it relatable to the readers.
2. His speech was full of colloquial expressions that made it difficult for non-native speakers to understand.
3. The colloquialism made the text less formal and more approachable.
4. The colloquial tone of the conversation made it more lively and engaging.
5. Colloquial language is often considered less formal than literary language.