a1500 Craft of Deyng (Cambr. Kk.1.5) in R. Girvan Ratis Raving & Other Early Scots Poems (1939) 171 Sic folkis suld erar be callyt bestis vnraconable than man rasonable.

1524 Court Bk. Barony of Carnwath 31 My lord folois Ville Vatson for injuris & unressionabill langage the inqueist puttis him in my l[ordis] vill of unracionabill langage & my l[ordis] to punis him as he thinkis metest.

1529 in W. C. Dickinson Court Bk. Barony of Carnwath (1937) 108 The said Mychell callit the said Alan mensuorne & the said Mychell is in mersement of this court for his unracionabill langage.

1791 Fragm. of Prophesy 52 Mr. Paine has accused Mr. Burke of ‘abominable depravity’—of the language of an ‘unrationable’ man—and of an unfeeling heart.

1945 Electr. World 29 Sept. 67/1 In other words, electric service being unrationable, the requirements for furnishing it are not divisible.

1975 S. Klaw Great Amer. Med. Show xiv. 232 Other forms of treatment are almost certain to be developed that will be just as valuable as kidney dialysis, just as expensive, and just as unrationable.

2007 J. Moran Queuing for Beginners viii. 101 Even during these years of postwar austerity and shortages, cigarettes were seen as a special, unrationable commodity.