intactible
/ˌɪntæk.tɪbəl/ iN-tak-ti-bəl
Definitions
1. adjective
Not capable of being broken or damaged; unbreakable.
“The manufacturer claimed that the new glass is intactible and shatterproof.”
2. adjective
Not capable of being changed or altered; unchangeable.
“The company’s policy was intactible, and they would not budge on their decision.”