wrinkle
nounUK /ˈrɪŋkl/
US /ˈrɪŋkl/
A small line or fold on skin or cloth.
Grandma has a wrinkle on her cheek when she smiles.
OTHER MEANINGS
2. A small problem or detail that is not obvious.
We found a wrinkle in the plan.
3. To make small lines or folds in something.
He wrinkled his shirt by stuffing it in the bag.
4. To make a face by tightening the skin, often to show confusion.
She wrinkled her nose at the smell.