bit
/ˈbit/
noun
the biting or cutting edge or part of a tool
a replaceable part of a compound tool that actually performs the function (such as drilling or boring) for which the whole tool is designed
the jaws of tongs or pincers
verb
to put part of a bridle in the mouth of (a horse) : to put a bit in the mouth of (a horse)
to control as if with a bit
to form a bit on (a key)
noun
a small quantity of food; especially : a small delicacy
a small piece or quantity of some material thing
a coin of a specified small denomination