Related Clues:

• Horrified sound
• Betray horror
• One might fight to the last one
• Sudden intake
• [Oh ... my ... God!]
• Surprised response
• [Oh, no!]
• First Greek letter
• "I don't believe it!" noise
• Sound frightened
• Inhale in shock
• Stunned sound
• Inhale in horror
• Express shock or surprise
• Last ___