unimpenetrable

English

Adjective

unimpenetrable (comparative more unimpenetrable, superlative most unimpenetrable)

1. (archaic) Synonym of impenetrable
   • 1859, Thomas William J. Connolly, The Romance of the Ranks, page 357:

     Those whom he most persecuted with his despatches were Sir John Burgoyne, Lord Panmure, Lord Palmerston, Sir George Grey, and that ancient and unimpenetrable tribune, the commissioners of Chelsea Hospital.

   • 1886, Frank S. Plant, Notes on the Philippines, page 45:

     Trees and shrubs growing on the muddy shores, where they form almost unimpenetrable barriers on low coasts.