Artificial intelligent assistant

defrayer

deˈfrayer
  [f. defray v. + -er1: cf. obs. F. defrayeur in Cotgr. 1611.]
  One who defrays or discharges a monetary obligation; a payer of expenses.

1580 North Plutarch (1676) 273 The Registers and Records kept of the defrayers of the charges of common Plays. 1755 Johnson, Defrayer, one that discharges expences.

Oxford English Dictionary

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