Oratorical (adjective)

1. Relating to an orator or to the art of public speaking.
2. Impressive in style of speech; delivered with eloquence and showmanship.

Origin:

Late 17th century, from latin oratorius 'of an orator'.

Examples:

1. The oratorical skills of Martin Luther King Jr. are renowned throughout the world.
2. He made a truly oratorical speech that held the audience spellbound for nearly an hour.
3. Her oratorical delivery was powerful and convincing.
4. The oratorical style of the politician was unforgettable.
5. The oratorical delivery of the preacher was commanding and passionate.