Tact and subtle skill in dealing with people so as to avoid or settle hostility.
The art and practice of conducting international relations by negotiating alliances, treaties, agreements etc., bilaterally or multilaterally, between states and sometimes international organizations, or even between polities with varying status, such as those of monarchs and their princely vassals.
The highest order of derivative (the differentiability class) over a given domain.
The condition of being smooth; the degree or measure of said condition.
The quantity measured by the modulus of smoothness.