1. Below the required standards for a purpose
   "an unfit parent"; "unfit for human consumption"
    
2. Not in good physical or mental condition; out of condition
   "drunk and unfit for service"; "fat and very unfit"; "certified as unfit for army service"
    
3. Physically unsound or diseased
   "He was declared unfit for military service";
   - bad, unsound

1. Make unfit or unsuitable
   "The scandal unfitted him for public office";
   - disqualify, indispose

Derived forms: unfitted, unfits, unfitting, unfitter, unfittest

See also: afflicted, apractic, apraxic, bandy, bandy-legged, bowed[2], bowleg, bowlegged, broken-backed, crookback [archaic], crookbacked [archaic], dipped, disabled, flabby, flaccid, game [informal], gammy [Brit, informal], gibbous, gimpy [N. Amer, informal], halt [archaic], halting [archaic], handicapped, humpbacked, hunchback, hunchbacked, ill, impaired, knock-kneed, kyphotic [technical], lame, lordotic, maimed, mutilated, sick, soft, spavined, subhuman, swayback, swaybacked, unhealthy, unsound, unsuitable

Type of: alter, change, modify

Antonym: fit