"To introduce an unusual or unfamiliar word, to coin new words, or to introduce a new meaning to a familiar word."

What is your question?

The process you are describing is called "neologism," which involves creating or introducing new words or giving new meanings to existing words. To better understand how this works, let me break down the three parts you mentioned:

1. Introducing an Unusual or Unfamiliar Word: In order to do this, you can follow a few steps:
a. Define the concept: Identify the idea or concept you wish to convey.
b. Understand word formation: Explore different ways to create a new word, such as blending two existing words (e.g., brunch = breakfast + lunch) or modifying an existing word (e.g., selfie).
c. Consider linguistic rules: Ensure that the newly created word adheres to the rules of the language, such as pronunciation, spelling, and grammatical patterns.

2. Coining New Words: This involves creating entirely new words that have not previously existed. Some strategies to coin new words include:
a. Portmanteau: Combine parts of two different words into a single word (e.g., "smog" from "smoke" and "fog").
b. Acronyms: Form a word by using the initial letters from a series of words, where each letter represents a word (e.g., "NASA" for National Aeronautics and Space Administration).
c. Borrowing: Adopt words from other languages or dialects to express a concept that does not have an equivalent in the current language (e.g., "sushi" from Japanese).

3. Introducing a New Meaning to a Familiar Word: To give a familiar word a new meaning, you can:
a. Contextualize: Use the word within a particular context that brings out the new meaning. For example, "cool" used to describe something fashionable or trendy.
b. Analogies and metaphors: Associate the word with a concept that is already well-known, thereby extending the word's meaning. For instance, "virus" used to describe something that spreads rapidly.

Remember, while neologisms can be creative and innovative, it is essential to use them judiciously and effectively to ensure effective communication and comprehension among language users.