Scottish National Dictionary (1700–)
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First published 1974 (SND Vol. IX).
This entry has not been updated since then but may contain minor corrections and revisions.
UNRIZZONABLE, adj. Also -raisonable. Sc. forms of Eng. unreasonable (Bwk. 1900 A.T.G. Annals Thornlea 27; em.Sc.
(a) 1973). See Rizzon. Adv. unrizzonably (Abd. 1932 Abd. Univ. Review (March) 100).