To restore from a ruffled state; to free from folds, wrinkles, irregularities, etc.; to make still or settled.

To become unruffled; to become, or be made, smooth, regular, or even; to become still or settled.

To make (a person, the emotions, etc.) calm or tranquil; to ease or lighten (a situation).

To become calm or tranquil emotionally; to relax, settle down.