unfit

If someone is unfit, they're not qualified. You're unfit for a job as an ice cream truck driver if your only driving experience has been steering a bumper car at an amusement park.

Farmland can be described as unfit for planting if it's been leached of nutrients, and a babysitter might be accused of being unfit if he gets distracted and loses track of his charges on the playground. In either case, the unfit thing or person doesn't meet the necessary requirements or standards. Another way to be unfit is to be out of shape or in poor physical condition. Fit can mean both "suitable" and "in good shape."

Definitions of unfit
1

adj below the required standards for a purpose

“an unfit parent”
unfit for human consumption”
Synonyms:
subhuman
unfit for human beings
unsuitable
not meant or adapted for a particular purpose
Antonyms:
fit
meeting adequate standards for a purpose
appropriate
suitable for a particular person or place or condition etc
acceptable
adequate for the purpose
suitable, suited
meant or adapted for an occasion or use
worthy
having qualities or abilities that merit recognition in some way
show more antonyms...

adj 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”
Synonyms:
afflicted, impaired
mentally or physically unfit
apractic, apraxic
having uncoordinated muscular movements, symptomatic of a CNS disorder
bandy, bandy-legged, bowed, bowleg, bowlegged
have legs that curve outward at the knees
broken-backed
(of a horse) having bones of the back united by a bony growth
crippled, game, gimpy, halt, halting, lame
disabled in the feet or legs
crookback, crookbacked, gibbous, humpbacked, humped, hunchbacked, kyphotic
characteristic of or suffering from kyphosis, an abnormality of the vertebral column
disabled, handicapped
incapable of functioning as a consequence of injury or illness
gammy
(British informal) sore or lame
knock-kneed
having the knees abnormally close together and the ankles wide apart
flabby, flaccid, soft
out of condition; not strong or robust; incapable of exertion or endurance
spavined
(of horses) afflicted with a swelling of the hock-joint
dipped, lordotic, swayback, swaybacked
having abnormal sagging of the spine (especially in horses)
maimed, mutilated
having a part of the body crippled or disabled
unhealthy
not in or exhibiting good health in body or mind
unsound
not sound financially
ill, sick
affected by an impairment of normal physical or mental function
Antonyms:
fit
physically and mentally sound or healthy
able, able-bodied
having a strong healthy body
conditioned, in condition
physically fit
healthy
having or indicating good health in body or mind; free from infirmity or disease
sound
financially secure and safe
well
in good health especially after having suffered illness or injury
show more antonyms...

adj physically unsound or diseased

Synonyms:
bad, unsound
unhealthy
not in or exhibiting good health in body or mind

v make unfit or unsuitable

Synonyms:
disqualify, indispose
Antonyms:
dispose, qualify
make fit or prepared
Type of:
alter, change, modify
cause to change; make different; cause a transformation

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