upturning

Under the upswelling tide he saw the writhing weeds lift languidly and sway reluctant arms, hising up their petticoats, in whispering water swaying and upturning coy silver fronds.

惊涛骇浪的海潮底下，他看到扭滚的海藻正懒洋洋地伸直开来，勉强地胳膊，裙裾撩得高又高，窃窃私语的水里曳羞怯的银叶。