from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To remove ruffles from; to make smooth.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To cease from being ruffled or agitated.
from The Century Dictionary and Cyclopedia
- To cease from being ruffled or agitated; subside to smoothness.
un- + ruffle (Wiktionary)