Merriam-Webster Collegiate Dictionary - wimple

 I. noun  Etymology: Middle English wimpel, from Old English; perhaps akin to Old English wipian to wipe  Date: before 12th century  1. a cloth covering worn over the head and around the neck and chin especially by women in the late medieval period and by some nuns  2. Scottish  a. a crafty turn ; twist  b. curve, bend  II. verb  (~d; wimpling)  Date: 13th century  transitive verb  1. to cover with or as if with a ~ ; veil  2. to cause to ripple  intransitive verb  1. archaic to fall or lie in folds  2. chiefly Scottish to follow a winding course ; meander  3. ripple