The Merriam-Webster Word of the day for May 20th was deasil. Note that it is deasil and not diesel (the fuel).
Deasil means clockwise. M-W says...
According to an old custom, you can bring someone good fortune by walking around the person clockwise three times while carrying a torch or candle. In Scottish Gaelic, the word "deiseil" is used for the direction one walks in such a luck-bringing ritual. English speakers modified the spelling to "deasil," and have used the word to describe clockwise motion in a variety of rituals.