IPA: /ʌnˈrɪŋkəld/
KK: /ʌnˈrɪŋkəld/
Smooth and free from wrinkles or creases.
She wore an unwrinkled dress to the party.
Unwrinkled → It is formed from "un-" (meaning not) and "wrinkle" (from Old English "wrynclian", meaning to twist or fold). The word "unwrinkled" means not twisted or folded, referring to a smooth surface without wrinkles.
Think of 'not' ('un-') having a 'twist' or 'fold' ('wrinkle') — that's why unwrinkled means smooth and free of wrinkles.