IPA: //ʌnˈtɑːrnɪʃt//
KK: /ʌnˈtɑrnɪʃt/
Not damaged or spoiled; remaining in its original, pure state.
The silver trophy remained untarnished despite being displayed for many years.
Untarnished → It is formed from "un-" (meaning not) and "tarnish" (from Old French *ternir*, meaning to make dull or to tarnish). The word "untarnished" means not made dull or not affected by tarnish, indicating something that remains bright and unblemished.
Think of 'not' ('un-') making something 'dull' or 'tarnished' — that's why untarnished means something that is still bright and unblemished.