unchewable
/ˌʌnˈtʃuːvəbəl/Definitions
1. adjective
Impossible to chew or break down in the mouth, typically because it is hard or rubbery.
“The dentist warned that the patient had eaten something unchewable and needed to be careful.”
2. noun
Something that is impossible to chew.
“The unchewable candy was a choking hazard for young children.”