Noun unfitness has 3 senses
  1. unfitness, poor shape, bad condition - poor physical condition; being out of shape or out of condition
    --1 is a kind of ill health, unhealthiness, health problem
    Antonyms: fitness, physical fitness, good shape, good condition
    --1 has particulars:
     infirmity, frailty, debility, feebleness, frailness; disability, disablement, handicap, impairment
  2. inability, unfitness - lacking the power to perform
    --2 is a kind of quality
    --2 has particulars:
     unadaptability; insensitivity, insensitiveness; incompetence, incompetency; incapability, incapableness; insufficiency
  3. unfitness - the condition of not being suitable; "the judges agreed on his unfitness for the appointment"
    --3 is a kind of
    unsuitability, unsuitableness, ineptness
    Antonyms: fitness, fittingness
    --3 has particulars: disqualification