eddy
Concise Oxford English Dictionary © 2008 Oxford University Press:
eddy/ˈedi/
▶noun (pl. eddies) a circular movement of water causing a small whirlpool. ▶verb (eddies, eddying, eddied) (of water, air, or smoke) move in a circular way.
– origin ME: prob. from the Gmc base of the OE prefix ed- ‘again, back’.
'eddy' also found in these Oxford entries:

