turbulence
n.
early 15c., from Late Latin turbulentia "trouble, disquiet," from Latin turbulentus (see turbulent). In reference to atmospheric eddies that affect airplanes, by 1918. Related: Turbulency.
〔李〕[turb;-ulencen.] n.骚动； 汹涌； 湍流 ←turb (L turba)=turmoil 喧嚷，吵闹