What are base words with no change?

It seems like you're asking about base words that remain unchanged when forming other words. This is a bit tricky because most base words do change in some way when they become part of a new word.

Here's a breakdown of why this is the case and some examples of what you might be looking for:

How Base Words Change:

* Suffixes: These are added to the end of a base word to change its meaning or grammatical function. Examples:

* "play" + "-ing" = "playing"

* "happy" + "-ness" = "happiness"

* Prefixes: These are added to the beginning of a base word to change its meaning. Examples:

* "un" + "happy" = "unhappy"

* "re" + "write" = "rewrite"

* Internal Changes: Sometimes the base word itself changes slightly to create a new word. Examples:

* "run" + "-ing" = "running" (vowel change)

* "strong" + "-er" = "stronger" (consonant change)

Base Words That Remain Unchanged:

While most base words change, there are a few cases where the base word remains completely unchanged:

* Proper Nouns: Names of people, places, or things often don't change when used in new words. Examples:

* "London" is used in "Londoner"

* "Shakespeare" is used in "Shakespearean"

* Compound Words: Some compound words are formed by simply combining two base words without any changes. Examples:

* "sun" + "flower" = "sunflower"

* "black" + "board" = "blackboard"

Important Note: Even with these examples, it's worth noting that the base words might undergo some changes in terms of pronunciation or stress, even if they are spelled the same.

Let me know if you have a specific word in mind or want to explore this further!