ununderstandable
adjEtymology From un- + understandable.
1
Not understandable; that cannot be understood.
- Cameron was for closing the discussion as useless and ununderstandable.1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 139:
- But to report an item or sequence of behaviour as radically ununderstandable is to say that it is so inaccessible to any possible explanation[…]1983, Walter Garrison Runciman, A treatise on social theory: