[noun] required activity; "the requirements of his work affected his health"; "there were many demands on his time" Synonyms: demand
[noun] anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained" Synonyms: necessity, essential, requisite, necessary
[noun] something that is required in advance; "Latin was a prerequisite for admission" Synonyms: prerequisite
