Possible Clues:

• What could deflate conclusion, we hear, is irritating
• Rather boring
• Sounds like part of the car with secrets of mechanics eventually starts - it's so tedious
• Boring ties -- more variation is needed
• Boring period in which to get sore troubled
• Hardly fascinating
• Boring father, first to last immersed in work
• Like the same old, same old
• Heavy book about anger, small and boring
• Don't weary everyone being boring