unfitness
1. [ noun ] lacking the power to perform
Synonyms: inability
Related terms: ability quality incompetence incapability insufficiency insensitivity unadaptability
2. [ noun ] (medicine) poor physical condition; being out of shape or out of condition
Synonyms: bad_condition poor_shape
Related terms: fitness ill_health disability infirmity
3. [ noun ] the condition of not being suitable
Examples:

"the judges agreed on his unfitness for the appointment"

Related terms: fitness unsuitability disqualification
Similar spelling:   unbitter
  unfitting