unfit

adj

1. Not fit; not having the correct requirements.

   “Jack cannot run, making him unfit for the track team.”

   “The latter engine was found unfit to take its return working at 5.35 p.m. from Luton, and No. 45616, Malta G.C., was provided by Kentish Town as substitute.”

   “On September 7, 1993, Sharon Bottoms lost custody of her two-year-old son to her own mother. A Virginia judge found that her sexual relationship with her lover was immoral and rendered her an unfit parent.”

   “Wading through history, he noted that some eugenicists believed that the “distinction between the fit and the unfit could be drawn along racial lines,” and others would define a person as “feeble-minded.””

2. Not fit, not having a good physical demeanor.

   “I've become so unfit after stopping cycling to town.”

3. (often)Unsuitable for a particular purpose.

   “Sadly, the station that proves to be the busiest - Blackpool Pleasure Beach - is unfit for purpose. It possesses a tiny canopy back from the platform that offers little in the way of shelter or amenities, other than a couple of benches.”

verb

1. To make unfit; to render unsuitable, spoil, disqualify.

   “He [...] added that he was fearful Christianity, or rather Christians, had unfitted him for ascending the pure and undefiled throne of thirty pagan Kings before him.”

   “These preoccupations unfitted the soldiers for the defence of the frontier, and permitted vigorous incursions of Germans form the north and Persians from the east.”

   “This life entirely unfits you for general practice.”

   “The Select Committee on Transport (Metropolitan Area) of 1919 concluded the following: "Trains were crowded not merely to excess, but almost to danger point. The crush in the 'peak hours' not only overloaded public conveyances, but subjected travellers - particularly the old, the feeble and women - to an amount of suffering, the effects of which often unfitted them temporarily for their ordinary duties."”