Artificial intelligent assistant

theretofore

theretofore, adv. Now formal.
  (ˌðɛətʊˈfɔə(r))
  [ME. þer tofore: see there 17 and tofore adv.]
  Before that time; previously to that.

c 1350 Will. Palerne 2611 Þei..wist þat þai in wast wrouȝt þer to-fore. 1430–40 Lydg. Bochas viii. i. (MS. Bodl. 263) 368/2 Emperors reknid for ther toforn was non. 1791 in Picton L'pool Munic. Rec. (1886) II. 205 The By-laws theretofore made. 1851 Gladstone Glean. (1879) VI. 4 A judgment that alienated dissenting endowments from purposes to which they had theretofore been applied. 1894 State Trials (N.S.) VI. 410 According to the canonical practice theretofore observed in England.

Oxford English Dictionary

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