v. i. [ 1st pref. un- + ruffle. ] To cease from being ruffled or agitated. Dryden. [ 1913 Webster ]
a. [ Pref. un- not + ruffled. ] Not ruffled or agitated; smooth; calm; tranquil; quiet. [ 1913 Webster ]
Calm and unruffled as a summer's sea. Addison. [ 1913 Webster ]