Related Clues:

• Horrified sound
• Complain, so to speak
• Wordless 'Ouch!'
• Response to a shock
• Show displeasure
• 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