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Wordage.info / wrinkle

Exact Match:

a clever method of doing something (especially something new and different)
a minor difficulty; "they finally have the wrinkles pretty well ironed out"
a slight depression in the smoothness of a surface; "his face has many lines"; "ironing gets rid of most wrinkles"
make wrinkles or creases into a smooth surface; "The dress got wrinkled"