Adaptable antonyms

What is the opposite word for Adaptable?

• inflexible

  able and usually willing to change
• unadaptable

  able and usually willing to change
• rigid

  able and usually willing to change, inflexible
• fixed
• invariable
• unalterable
• unchangeable
• nonconforming

  able and usually willing to change
• stiff

  able and usually willing to change
• constant
• immutable
• intractable
• limited
• established
• inelastic
• nonmalleable
• ramrod
• set
• unbudgeable
• unbending
• amateur
• inexperienced
• stable
• steady
• unchanging
• uniform
• unvarying
• elastic