adjective

of a suitable quality, standard, or type to meet the required purpose.

the house was not fit for human habitation

suitable,good enough,relevant,pertinent,apt,appropriate,suited,apposite,apropos,-worthy,fitting,befitting,proper,due,seemly,decorous,decent,right,correct,comme il faut,meet

verb

be of the right shape and size for.

those jeans still fit me

be big/small enough (for),be the right shape (for),fit like a glove

noun

the particular way in which something, especially a garment or component, fits.

the dress was a perfect fit