unadjustable

/ˌʌnəˈdʒʌstəbəl/
adjective
  1. Not able to be changed, modified, or set to a different position or level.
    • This shelf is unadjustable, so you cannot change its height.
    • The seatbelt in the old car was unadjustable and uncomfortable for tall drivers.
    • The thermostat is unadjustable in this room, so the temperature stays the same.
Synonyms
What does "unadjustable" mean? | whatsthatwordmean | whatsthatwordmean