The condition of being fit, suitable or appropriate. / The cultivation of an attractive and/or healthy physique.

plural of fitness

Ready, appropriate, suitable, or in keeping

present participle of fit / (informal, US, with infinitive) Getting ready; preparing.

A small part, especially a standardized or detachable part of a device or machine.

(transitive) To be of the right size and shape to be placed in a location. / (transitive, figuratively) To be of similar cultural or social status as the members of a group of people.

plural of fitting

plural of fit

Third-person singular simple present indicative form of fit

Used other than figuratively or idiomatically: see fit, in. / (figuratively, intransitive) To be of a like type with others; to be socially accepted. / (with with) To suit or conform to.