IPA: /ˌʌn.dɪˈfaɪld/
KK: /ʌndɪˈfaɪld/
Not having any stains, marks, or corruption; pure and clean.
The undefiled beauty of the landscape took my breath away.
Undefiled → It is formed from "un-" (meaning not) and "defiled" (from Old French *defilier*, meaning to make dirty or to sully). The word "undefiled" means not made dirty or pure.
Think of 'not' ('un-') making something 'dirty' ('defiled') — that's why undefiled means something that remains pure.