noun
unanimity
yoo-nuh-NIM-uh-tee/ˌjuːnəˈnɪməti/
Complete agreement among everyone involved.
The board reaches unanimity on the new safety rules.

Etymology
The roots picture several people as having “one mind.” Unanimity names that shared state: agreement extending to everyone involved, rather than merely a majority.
In context
the state weakened when private interests begin to make themselves felt and small associations to exercise an influence on the state the common interest is injuriously affected and finds adversaries unanimity no longer Reigns in the voting
More examples
- One objection is enough to prevent unanimity.
- The club requires unanimity before changing its membership rules.
- There is rare unanimity among the neighbors about saving the park.
Forms
unanimity
unanimous adjective — Sharing the same opinion or decision.
unanimously adverb — With everyone expressing the same agreement.