1. something that makes something else weaker or less strong

Examples

• The constant rain was a weakener of the old wooden fence.
• Stress can be a major weakener of the immune system.
• The new policy acted as a weakener of employee morale.
• Age is often considered a weakener of physical abilities.
• Poor nutrition serves as a weakener of bone density.
• The scandal became a weakener of public trust in the institution.