Wearing or fitted with a bit in the mouth, typically said of a horse that has been prepared for riding with a bridle and bit.
From the noun 'bit' (the metal device placed in a horse's mouth) plus the suffix '-ed' meaning 'equipped with.' The word has been used in horsemanship since at least the Middle English period.
A horse's behavior can completely change based on the type of bit used—some bits are designed to be gentler, while others give more control, and experienced riders can tell a horse's temperament and training just by seeing what kind of bit it's wearing.
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