noun
Wrinkles are lines that form on someone’s face as they grow old. 皱纹
verb
When someone’s skin wrinkles or when something wrinkles it, lines start to form in it because the skin is getting old or damaged.
If cloth wrinkles, or if someone or something wrinkles it, it gets folds or lines in it.
Her stockings were wrinkling at the knees.
她长袜的膝盖处起了褶皱。