atony (n.)

• adynamia
• anemia
• cachexia
• cachexy
• cowardice
• debilitation
• debility
• dullness
• etiolation
• faintness
• fatigue
• feebleness
• flabbiness
• flaccidity
• impotence
• languor
• lassitude
• listlessness
• prostration
• sluggishness
• softness
• weakness
• weariness