Pronunciation: /dɪˈreɪlər/
noun a mechanism for changing gears on a bicycle, typically consisting of a chain, sprockets, and a mechanism to move the chain from one sprocket to another
A1 The derailleur on my bike helps me change gears.
A2 I need to adjust the derailleur on my bicycle because it's not shifting properly.
B1 Learning how to maintain and repair a derailleur is essential for any cyclist.
B2 The derailleur on my mountain bike is a high-quality component that ensures smooth gear changes.
C1 After years of experience, I can now easily troubleshoot any issues with a derailleur.
C2 The professional cyclist carefully fine-tuned his derailleur for optimal performance in the race.
formal The derailleur is a crucial component of a bicycle's drivetrain system.
informal I had to adjust my derailleur after it started making a strange noise.
slang My derailleur got all messed up on that bumpy trail.
figurative His bad decisions acted like a derailleur, causing his life to go off track.
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