inflexible

extended meanings; incapable of change

• “a man of inflexible purpose”

not making concessions

• “took an uncompromising stance in the peace talks”
• “uncompromising honesty”

literal meanings

• “an inflexible iron bar”
• “an inflexible knife blade”

incapable of adapting or changing to meet circumstances

• “a rigid disciplinarian”
• “an inflexible law”
• “an unbending will to dominate”