Related Clues:

• Threat's ending
• Prohibition starter
• "No Trespassing" sign site
• Bully's words
• Bullying words
• Mom's tough emphasis
• "They'll ambush you if you go in there!"
• Warning often shouted too late
• Unsettling last words
• "... otherwise, you'll be sorry!"
• Otherwise - that's a threat
• Otherwise - it's a threat
• Otherwise - may be threatening
• If not, then - sounds like a threat
• Do it . . . . . . - an informal warning