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Meaning of hardmouthed

hard•mouthed

Pronunciation: (härd'moud", -moutht"), [key]
— adj.
  1. of or pertaining to a horse not sensitive to the pressure of a bit.
  2. stubborn; obstinate; self-willed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.