What does "inflexible" mean?

Inflexible: Firm in will or purpose; not to be turned, changed, or altered; resolute; determined; unyieding; inexorable; stubborn. "Inflexibleas steel." Miltom. Amanof upright and inflexibletemper . . . can overcome all private fear. Addison.

Additional senses

  1. 2.Incapable of change; unalterable; immutable. The nature of things is inflexible. I. Watts.

Sources