Possible Clues:

• Physical prevention of access
• Obstruction of access, as to entry of goods
• Action taken to prevent entry as of goods
• The sealing off a place to prevent entry or exist
• Can't get through bar to Bill on boat
• Closure of port to prevent entry or exit
• Military restriction of access
• Isolation of an area of importance to the enemy
• Instructed to include seal to prevent entry
• Military operation ordered second row in