(n.) Want of tone; weakness of the system, or of any organ, especially of such as are contractile.

adynamia anemia blah feeling bloodlessness cachexia cachexy cowardice debilitation debility dullness etiolation faintness fatigue feebleness flabbiness flaccidity impotence languishment languor lassitude listlessness prostration sluggishness softness strengthlessness weakliness weakness weariness