Artificial intelligent assistant

unscalable

unˈscalable, a.
  (un-1 7 b and 5 b.)

1579–80 North Plutarch (1595) 1083 After he had measured the height of the wall, he reported that the place was not vnscalable. 1611 Shakes. Cymb. iii. i. 20 Your Isle, which stands As Neptunes Parke, ribb'd, and pal'd in With Oakes vnskaleable. 1652 Heylyn Cosmogr. iii. 222 High and unscalable walls. 1751 R. Paltock P. Wilkins I. 91, I saw no Entrance into the Island,..nor any thing but the same unscalable Rock. 1818 Keats Endym. iii. 23 There are throned seats unscalable But by a patient wing. 1850 Lynch Theoph. Trinal xi. 211 The frowning unscalable rocks of worldly custom.

Oxford English Dictionary

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