To execute or perform a function; to transact one's regular or appointed business.(verb)
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Use "functionate" in a sentence
"Peters 'theory is plausible that the screw-like joint between the tibia and the tibial tarsal (astragulus) bones causes these structures to functionate in a manner not in harmony with the provisions allowed by the collateral ligaments of the tarsus, permitting movement only in a direction parallel with the long axis of the body."
"The ovaries and uterus atrophy or shrink in size, and cease to functionate."
"Substantive, not yet brought into action and made to functionate as"