Final answer:
The most accurate word to describe arbitration is 'Confidential' because the process is private and details are not publicly disclosed.
Step-by-step explanation:
Arbitration is a method of resolving disputes outside of the court system where an arbitrator makes a decision after hearing both sides present their case. The correct answer to which word most accurately describes arbitration is D. Confidential. This is because the arbitration process is private, and the details are not disclosed to the public, in contrast to court proceedings which are typically part of the public record. As for other options, arbitration is not inherently temporary as its decisions are usually final and binding; it is not nonconsensual because parties agree to arbitrate as a way of resolving disputes; and it is intended to be unbiased, with the arbitrator serving as a neutral third party.