unshavable
/ˌʌnˈʃævəbəl/Definitions
1. adjective
Impossible to shave, especially because of a thick or stubborn beard or hair.
“The unshavable stubble made him look like a rugged outdoorsman.”
2. adjective
Impossible to remove or get rid of, especially because of being stubborn or persistent.
“The unshavable stains on the carpet required professional cleaning.”