Definition of deep-mouthed in English:

deep-mouthed

adjective

archaic
  • (of a dog) having a deep-sounding bark.

    • ‘Master Cromwell presented his Majesty with many rich and acceptable gifts: as a very great and a fair wrought standing cup of gold, goodly horses, fleet and deep-mouthed hounds.’
    • ‘On this being pulled there was a faint tinkle, followed by a canine uproar of the most miscellaneous description, the deep-mouthed bay of the blood-hound, the sharp yap-yap of the toy terrier, and a chorus of intermediate undistinguishable barkings, some fierce, some frolicsome, some expectant, being mixed up with the rattling of chains.’
    • ‘It must be an exciting chase to rouse the lord of this wild mountain forest on a sunny morning, with the first hoar frost yet crisping the feathery pines; and to hear the deep-mouthed hounds giving tongue where an hundred echoes wait to bay the fierce challenge back, and to hear the sharp crack of the rifle rattle through the thin air.’