Grŭm, a.
a. [A-S. grum, grom, gram, grim, Dan. grum, Sw. grym, furious; not from A-S. geómor, sad, sorrowful. See GRIM.]
Sense 1. Morose; severe of countenance; sour; surly; glum; grim. Arbuthnot.
Sense 2. Low; deep in the throat; guttural; rumbling; as, a grum voice.