reticent

adj. 无言的,沉默的,谨慎的

retain, retainer, retaining wall, retake, retaliate, retaliation, retaliatory, retard, retardant, retardation, retarded, retch, retd, retell, retention, retentive, retentively, retentiveness, rethink, reticence, reticently, reticulated, reticulation, reticule, retina, retinue, retire, retired, retirement, retirement age, retiring, retort, retouch, retrace, retract, retractability, retractable, retractile, retraction, retread,