impassible

/IH0 M P AE1 S IH0 B AH0 L/
adjective
  1. 1

    Unable to suffer, or feel pain.

  2. 2

    Unable to feel emotion; impassive.

  3. 3

    Incapable of suffering injury or detriment.

Source: https://en.wiktionary.org/wiki/impassible