reduplicate

v [Tn] (fml 文) repeat (esp a word or syllable), as in bye-bye; double 重复（尤指词或音节）（如bye-bye）; 使加倍.

redistribution, redly, redness, redo, redolence, redolent, redouble, redoubt, redoubtable, redound, redress, redskin, reduce, reduce to, reducible, reductio ad absurdum, reduction, redundancy, redundant, redundantly, reduplication, redwood, reed, reediness, reedy, reef, reef-knot (US square-knot), reefer, reek, reel, reenact, reeve, reexamine, reexport, ref, reface, refectory, refer, refer oneself to, refer to,