QUIESCENT Meaning of QUIESCENT in English a. 1.Quiet, resting, still, motionless, at rest, at a stand, stock-still, standing still.2.Quiet, still, placid, calm, unagitated, undisturbed, tranquil, serene, unruffled.3.Silent. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012