1. He who or that which weakens.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• weakeness,
• weaknnes,
• weener,
• weekenes,
• weakene,
• weakned,
• laecener,
• weakenes,
• weakenerr,
• wekener,
• weakner,
• weakeener,
• weekener,
• weakaner,
• weakenar,
• Awekener,
• wakeener,
• wakenner,
• weanednes,
• wesconer

• weisner,
• weesner,
• wegener,
• Wessner,
• wegner,
• wesner.

The adjective form of the word "weakener" is "weakening".

The plural of the "weakener" can be the "weakeners".

The singular of the "weakener" can be the "weakener".