How do you add the suffix able to notice?

The word "notice" is already a verb, so you don't need to add "able" to make it an adjective.

However, you can create an adjective by adding the suffix "-able" to a related word, like "noticeable."

Here's the breakdown:

* Notice: Verb, meaning to observe or become aware of something.

* Noticeable: Adjective, meaning capable of being noticed or easily perceived.

Example:

"The change in her attitude was noticeable to everyone."