Orotund is an adjective that means resonant and imposing.
Rotund, meaning round, has roughly the same origin of orotund. Both words come from the Latin rotundum (ro TOON doom) meaning rounded. In the case of our word of the day, it refers to the shape of a rounded mouth when making resonant sounds.
I’ve been told I should be an opera singer. I guess I have a very orutund voice.