/ ˌkɒnstɪˈtjuːtɪv; NAmE ˌkɑːnstəˈtuːtɪv/ adjective
( formal ) constitutive (of sth) forming a part, often an essential part, of sth :
Memory is constitutive of identity.
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WORD ORIGIN
late 16th cent.: from late Latin constitutivus , from constitut- established, from the verb constituere , from con- together + statuere set up.