Adjective unfit has 3 senses
  1. unfit - below the required standards for a purpose; "an unfit parent"; "unfit for human consumption"
    fit, fit to, fit for, acceptable, appropriate, suitable, suited
  2. unfit - not in good physical or mental condition; out of condition; "fat and very unfit"; "certified as unfit for army service"; "drunk and unfit for service"
    fit, healthy, able, able-bodied, conditioned, in condition
  3. bad, unfit, unsound - physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
    Antonym: healthy (indirect, via unhealthy)
,Verb unfit has 1 sense
  1. disqualify, unfit, indispose - make unfit or unsuitable; "Your income disqualifies you"
    --1 is one way to change, alter, modify
    Sample sentences:
    Something ----s somebody
    Something ----s something