unwrinkle

verb

1. (transitive)To remove wrinkles from.

   “He and she sat side by side like two wax people while the waiter stretched across to unwrinkle the tablecloth and straighten the knives.”

   “The job was done before Silver could unwrinkle the grimace on his face.”

2. (intransitive)To stop being wrinkly; to become flat or smooth.

   “His head protruded out of his torn collar much as the head of the tortoise protrudes from its shell, the throat unwrinkling, the eyes like beads, or pips of jet.”

   “In a rain barrel, water unwrinkles to glass; a lime tree’s daughter there studies her face.”

   “Emma went through the closet and removed the black gabardine jacket she had hung up to unwrinkle.”