The term 'draining effect' can be described by two crossword solutions: EDDY (4 letters) and WHIRLPOOL (9 letters). An EDDY is a swirling body of water that is created when a current of water flows around an obstacle or into a different direction. This creates a circular motion that can cause a draining effect. A WHIRLPOOL is a large, powerful EDDY that is formed when two opposing currents meet. The draining effect of a WHIRLPOOL is much more powerful than that of an EDDY.