IPA: //ʌnˈplaɪənt//
KK: /ʌnˈplaɪənt/
Not flexible or easily bent; rigid.
The unpliant material could not be shaped into the desired form.
Unpliant → It is formed from "un-" (meaning not) and "pliant" (from Latin "plicare", meaning to fold). The word "unpliant" means not able to be folded or flexible, indicating rigidity or inflexibility.
Think of 'not' ('un-') being combined with 'folding' ('pliant') — this helps you remember that unpliant means something that cannot be easily bent or is rigid.