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1. Unskillfulness resulting from a lack of training
   - awkwardness, clumsiness, ineptness, ineptitude, maladroitness, cack-handedness [Brit]
    
2. A rate demonstrating an absence of haste or hurry
   - deliberation, deliberateness, unhurriedness
    
3. Lack of normal development of intellectual capacities
   - retardation, mental retardation, backwardness, subnormality

Derived forms: slownesses

See also: slow

Type of: pace, rate, stupidity, unskilfulness [Brit, Cdn], unskillfulness [N. Amer]

Encyclopedia: Slowness