the quality or condition of being incompetent; lack of ability.
dealing with very profound, difficult, or abstruse subject matter:
weariness of body or mind from strain, oppressive climate, etc.; lack of energy; listlessness; languor.
To debase or make impure by adding inferior materials or elements; use cheaper, inferior, or less desirable goods in the production of any professedly genuine article:
diligent in application or attention; persistently or carefully maintained