a. (UN-1 7 b, 5 b.)
1611. Cotgr., Indivinable, vndiuinable, most obscure, not to be ghessed at.
1858. Carlyle, Fredk. Gt., VI. iii. (1872), II. 159. He … was complimentary to a degree,—for reasons undivinable to Wilhelmina.
