unchangeable

adj

1. Not changeable; incapable of being changed or of changing; immutable.

   “Less than 15 minutes in, he noted that he had signed an executive order declaring that the federal government will only recognize two unchangeable sexes, male and female, and another order banning trans women from participating in women’s sports.”

   “Psychologists call this the entity theory of intelligence, which is simply the belief that ability is innate and unchangeable.”

noun

1. Something that cannot be changed.