resistant

US /rɪˈzɪs.tənt/
UK /rɪˈzɪs.tənt/
1.

offering resistance to something or someone.

:
some of the old Churches are resistant to change
2.

denoting starch that is not easily broken down by enzymes within the body and is therefore minimally absorbed during digestion.

:
cooked rice, like bread, contains a useful amount of resistant starch, which acts like fiber in the digestive system