Inflexible

The rule is utterly inflexible.

We're inflexible.

You're inflexible.

Tom is inflexible.

I'm inflexible.

Every politician must be responsive to complaints from the public, or he or she will become inflexible and make disastrous decisions.

I think Tom is inflexible.

I'm not inflexible.

Tom is very inflexible.

You're too inflexible.

Being so inflexible, the railway was easy prey to road competition, and the arrival of unregulated lorry transport from farm fields to town centres quickly captured all locally generated business.