slowness

Noun

• lack of normal development of intellectual capacities

• a rate demonstrating an absence of haste or hurry

• unskillfulness resulting from a lack of training

Related words

• Synonyms: 
  retardation , mental retardation , backwardness , subnormality , deliberation , deliberateness , unhurriedness , awkwardness , clumsiness , ineptness , ineptitude , maladroitness