ppl. a. (UN-1 10, 5 b.)
1611. Florio, Ininteligente, vnunderstanding.
a. 1656. Lovelace, Lucasta, Peinture. Lets walk hand in hand, And smile at this un-understanding land.
1862. Mrs. N. Crosland, Mrs. Blake, II. 219. I know that the most crystalline phrases have been dragged through the mud of common ununderstanding usage.
1891. H. Herman, His Angel, 77. The thoughtless ununderstanding girl was gone, and a blushing woman stood there in her stead.