What is the meaning of inflexible?

adjective

• Incapable of change.
  • usage: "a man of inflexible purpose"
• Not making concessions.
  • usage: "took an uncompromising stance in the peace talks"; "uncompromising honesty"
  • synonyms: uncompromising, sturdy
• Resistant to being bent.
  • usage: "an inflexible iron bar"; "an inflexible knife blade";
• Incapable of adapting or changing to meet circumstances.
  • usage: "a rigid disciplinarian"; "an inflexible law"; "an unbending will to dominate"
  • synonyms: rigid, unbending