Related Clues:

• Blocks
• Frustrates
• Foils
• Hinders
• Short-circuits
• Gets in the way of
• Stymies
• Blocks the rowers' seats
• Obstructs rowers' benches
• Prevents the majority of the verrucas
• Blocks, prevents
• Prevents tooth enamel defects
• Crosses town to get suit, changing direction once
• Foils, as a plan