Other forms: bits
A bit is the metal bar that sits in a horse's mouth. Take the bit, a snaffle bit.
It rests on the gum where there are no teeth, which is why a horse tolerates it at all. A horse that takes the bit between its teeth cannot be stopped, which is where the phrase comes from.
1nounhorseThe metal bar that sits in a horse's mouth.
“The bit rests on the gum where there are no teeth.”
bit is a part.
Old English bite, a bite or cut, from the same root as the verb bite.
Middle English
bitte
English, today
bit
Built from
From Middle English bitte. From Middle English bitte, bite, from Old English bita (“bit; fragment; morsel”) and bite (“a bite; cut”), from Proto-Germanic bitô and bitiz; both from Proto-Indo-European bʰeyd- (“to split”). More at bite. 2
Etymology from Wiktionary, CC BY-SA