Related Clues:

• Opposition
• Lovers' sounds
• Sounds of relief
• Yearns
• Debate no-nos
• 'If only...' sounds
• They may accompany rolled eyes
• 'Alas' and 'alack'
• They're often heaved
• Audible laments
• Resigned exhalations
• Relieved sounds
• Bridge of --
• Expresses impatience, in a way
• They may be let out in relief