etymologeek.com dictionary
English word bit comes from Old English *butt, Old English byt, Old English bytt, Old English bite (Bite.), Old English bita (Bite (of food), mouthful.).

Bit etymology history?

Bit detailed word origin explanation

Dictionary entryLanguageDefinition
*butt Old English (ang)
byt Old English (ang)
bytt Old English (ang)
bite Old English (ang) Bite.
bita Old English (ang) Bite (of food), mouthful.
botte Middle English (enm)
bit English (eng) (transitive) To put a bridle upon; to put the bit in the mouth of (a horse). To a small extent; in a small amount (usually with "a"). (US) An eighth of a dollar. Note that there is no coin minted worth 12.5 cents. (When this term first came into use, the Spanish 8 reales coin was widely used as a dollar equivalent, and thus the 1 real coin was equivalent to 12.5 cents.). (dated, British) A [...]

Words with the same origin as bit

Descendants of *butt
and baht bra bro brother bruv bub bubba bud buddy but for halibut nor
Descendants of byt
butt butter