旋涡
xuán wō · HSK 7
whirlpool
🌀 旋 revolve/spin + 涡 eddy = water that spins into a whirlpool
旋 (xuán) means to revolve or rotate; 涡 (wō) is an eddy or swirl of water. Together they name the spinning funnel of a whirlpool or vortex. The wō sound echoes the round O shape of the swirl.