To undo a folding.
To release from a fold or pen.
To turn out; to happen; to develop.
To open (anything covered or closed); to lay open to view or contemplation; to bring out in all the details, or by successive development.
To reveal.
In functional programming, a kind of higher-order function that is the opposite of a fold.
A twist on something existing; a novel difference.
A fault, imperfection or bug especially in a new system or product; typically, they will need to be ironed out.
A small furrow, ridge or crease in an otherwise smooth surface.
A winkle
A line or crease in the skin, especially when caused by age or fatigue.
To develop irreversibly wrinkles; to age.
To make wrinkles in; to cause to have wrinkles.
To pucker or become uneven or irregular.