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de·sid·er·a·tum
diˌsidəˈrätəm,-ˈrātəm,-ˌzidə-/
noun
plural noun: desiderata

something that is needed or wanted.
"integrity was a desideratum"
synonyms: requirement, prerequisite, need, indispensable thing, sine qua non, essential, requisite, necessary
"integrity was a desideratum"