Inexpressible (adjective)

1. Not able to be expressed or communicated.
2. Not able to be described in words.

Origin:

This word is formed by the combination of the prefix "in-" meaning "not" and the word "expressible" meaning "able to be expressed or communicated".

Examples:

1. The beauty of the sunset was inexpressible.
2. His feelings of love were inexpressible and he could not find the words to describe them.
3. The pain was inexpressible, and he couldn't put it into words.
4. The joy that the child felt was inexpressible and it shone on her face.
5. The gratitude that he felt was inexpressible and he could only nod in response.