slowness

(noun) unskillfulness resulting from a lack of training. Synonyms: awkwardness, clumsiness, ineptness, ineptitude, maladroitness.

(noun) a rate demonstrating an absence of haste or hurry. Synonyms: deliberation, deliberateness, unhurriedness.

(noun) lack of normal development of intellectual capacities. Synonyms: retardation, mental retardation, backwardness, subnormality.