break

break  1. vt. To cause to be {broken} (in any sense).
   "Your latest patch to the editor broke the paragraph commands."
   2. v.  (of a program) To stop temporarily, so that it may debugged.
   The place where it stops is a `breakpoint'.  3. [techspeak]
   vi. To send an RS-232 break (two character widths of line high)
   over a serial comm line.  4. [UNIX] vi. To strike whatever key
   currently causes the tty driver to send SIGINT to the current
   process.  Normally, break (sense 3), delete or {control-C} does
   this.  5. `break break' may be said to interrupt a conversation
   (this is an example of verb doubling).  This usage comes from radio
   communications, which in turn probably came from landline
   telegraph/teleprinter usage, as badly abused in the Citizen's Band
   craze a few years ago.