Related Clues:

• Terminate
• It's followed by "Who goes there?"
• "Freeze!"
• Pause
• Guard's shout
• Marching order
• Cease
• Checkpoint Charlie shout
• Sentry's shout
• Sentry's call
• Sentry's "Stop!"
• ''Stop right there!''
• Suffer a moment of weakness
• Obey a sentry
• What things may grind to