corrugate

/K AO1 R AH0 G EY0 T/
verb
  1. 1

    (of the skin) To wrinkle.

  2. 2

    To fold into parallel folds, grooves or ridges.

adjective
  1. 1

    Corrugated; wrinkled; crumpled; furrowed

Source: https://en.wiktionary.org/wiki/corrugate