下旋

下旋	xià xuán	(sport) backspin
下	xià	down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action
旋	xuán	to revolve / a loop / a circle
旋	xuàn	to whirl / immediately / variant of 镟