Artificial intelligent assistant

corrobore

coˈrrobore, v. Obs. rare.
  Also 5–6 co(r)rober.
  [a. F. corroborer (15th c. in Littré):—L. corrōborāre to corroborate.]
  = corroborate.

1485 Caxton Chas. Gt. 1 The cristen feyth is affermed and corrobered by the doctours of holy chyrche. a 1536 Rastell in Ellis Orig. Lett. Ser. iii. II. 309, I purpose to corober it with mo auctorytees. 1563 Winzet Four Scoir Thre Quest. Tractates (1887) I. 69 Corroboring our iugement with sufficient defensis.

Oxford English Dictionary

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