mindmap root((安静)) still applies to what is motionless and adds the implication of hush or absence of sound: the ~, dark night. quiet like still, may imply absence of perceptible motion or sound or of both but it is likely to stress absence of excitement or turbulence and connote tranquility, serenity, or repose: a ~ town. silent may apply to motion or stir unaccompanied by sound and carries a strong impression of silence: a submarine equipped for ~ running. noiseless also applicable to soundless motion, usually connotes absence of commotion or of sounds of activity or movement: a cat slowly advancing on ~ feet.