Not able to be negotiated or altered.
Non- + negotiable.
- The terms of the contract are nonnegotiable.
- The company's policy is nonnegotiable and must be followed.
- The price is nonnegotiable, it is fixed and cannot be changed.
- The nonnegotiable points of the agreement must be respected.
- The issue is nonnegotiable, it is not open for discussion or debate.