Unutterable (adjective)

1. Incapable of being spoken or expressed in words.
2. Too overwhelming or intense to be described in words.

Origin:

Derived from the word 'utter' meaning to say or express.

Examples:

1. The beauty of the sunset was unutterable.
2. The loss she felt after the death of her child was unutterable.
3. The love he felt for his wife was unutterable.
4. The amount of pain he was in was unutterable.
5. The joy she felt after winning the race was unutterable.