retardation

n [U]: mental retardation 智力迟钝.

resurface, resurge, resurgence, resurgent, resurrect, resurrection, resuscitate, resuscitation, ret (also retd), retail, retailer, retain, retainer, retaining wall, retake, retaliate, retaliation, retaliatory, retard, retardant, retarded, retch, retd, retell, retention, retentive, retentively, retentiveness, rethink, reticence, reticent, reticently, reticulated, reticulation, reticule, retina, retinue, retire, retired, retirement,