Artificial intelligent assistant

thirdsome

ˈthirdsome, a. Obs. rare.
  In 5 thryd-, þridde-, thyrd(e)-.
  [f. third a. + -some.]
  Being one of three; accompanied by two others.

c 1425 Eng. Conq. Irel. 14 Othere thwey cantredes he yaf heruy of Mountmorthy,..a knyght þat com in that same flote, hym þriddesum [v.r. thyrdesum] of knyghtes. Ibid. 32 Heruy of Mountmorthy, that to ham was ycome, hym thrydsome [v.r. thyrdsome] of knyghtes.

Oxford English Dictionary

yu7NTAkq2jTfdvEzudIdQgChiKuccveC 168dab0e1ef827362b0e43eaa29cb387