IPA: /ʌnˈdɛntɪd/
KK: /ʌnˈdɛntɪd/
Not having any dents or indentations; smooth and even in surface.
The car's body was undented after the accident, showing no signs of damage.
Undented → It is formed from "un-" (meaning not) and "dent" (from Latin "dentare", meaning to indent or make a notch). The word "undented" means not having any indentations or not marked by notches.
Think of 'not' ('un-') having any 'notches' ('dent') — that's why undented means without any indentations.