nondeforming
/ˌnɑndɪˈfɔrmɪŋ/
adjective
- Not changing shape or form under pressure or stress.
- The bridge is made of a nondeforming steel alloy that can withstand heavy loads.
- This nondeforming foam mattress keeps its shape even after years of use.
- Engineers tested the material to ensure it was nondeforming under extreme temperatures.