rattle

v.发出咯咯声；喋喋不休 n.咯咯声，吵闹声；拨浪鼓

rating, ratio, ratiocination, ration, rational, rationale, rationalism, rationalist, rationalistic, rationality, rationalization, rationalization, rationalisation, rationalize, rationalize, rationalise, rationally, rationing, ratline (also ratlin), rats, rattan, ratter, rattlesnake, rattling, ratty, raucous, raucously, raucousness, raunchily, raunchiness, raunchy, ravage, rave, ravel, raven, ravening, ravenous, ravenously, raver, ravine, raving, ravings,