“Sonorous” comes from the Latin word for “sound,” but this adjective is used to describe a very specific type of sound, usually of a full and imposing nature. When describing a person’s voice, it means the tone is imposingly full and deep. Think James Earl Jones and Morgan Freeman. “Sonorous” can apply to sound-making objects as well, such as ringing bells or booming horns. Finally, the adjective applies to the quality of language itself — sonorous speech is imposing and impressive in style, not just sound.