bit 2 
(bĭt)
(bĭt)n.
1. The sharp part of a tool, such as the cutting edge of a knife or axe.
2. A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.
3. The part of a key that enters the lock and engages the bolt and tumblers.
4. The tip of the mouthpiece on a pipe or a cigarette or cigar holder.
5. The metal mouthpiece of a bridle, serving to control, curb, and direct an animal.
6. Something that controls, guides, or curbs.
tr.v. bit·ted, bit·ting, bits
Idiom: 1. To place a bit in the mouth of (a horse, for example).
2. To check or control with or as if with a bit.
3. To make or grind a bit on (a key).
have/take the bit in one's teeth
To be uncontrollable; cast off restraint.
[Middle English bite, from Old English, act of biting; see bheid- in the Appendix of Indo-European roots.]
- unarticulated
- unary operation
- unashamed
- unashamedly
- unasked
- unassailability
- unassailable
- unassailableness
- unassailably
- unassembled
- unassertive
- unassertively
- unassertiveness
- unassisted
- unassuming
- unassumingly
- unattached
- unattainability
- unattainable
- unattainably
- unattended
- unattested
- unattributed
- unau
- unaudited