Artificial intelligent assistant

setfast

setfast
  (ˈsɛtfɑːst, -æ-)
  [f. set v.1 (? vb.-stem or pa. pple.) + fast adv.]
  A hard tumour on a horse's back; = sitfast 1. Also dial. ‘a gathering, tumour; the central part of a wound or boil’ (Eng. Dial. Dict.).

1709 Lond. Gaz. No. 4591/4 A..Gelding,..with..a Set fast under the Saddle. 1826 Cobbett Rur. Rides (1885) II. 192 This man..is a sore to Westminster; a set-fast on its back. 1866 Morn. Star 10 July, On examination he perceived it had a bad back, a set-fast [etc.].

Oxford English Dictionary

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