Opaque
Opaque adjective - Not having or showing an ability to absorb ideas readily.
Usage example: people are sometimes rude to her, but fortunately she's too opaque to realize what's happening
Witless and opaque are semantically related. In some cases you can use "Witless" instead an adjective "Opaque".
Nearby Words: opaqueness, opaquely
Witless
Witless adjective - Not having or showing an ability to absorb ideas readily.
Usage example: a dog so witless that it is barely trainable
Cite this Source
Witless and Opaque. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/opaque/witless
Opaque & Witless. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/opaque/witless>.
Witless or Opaque. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/opaque/witless.
Google Ngram Viewer shows how "opaque" and "witless" have occurred on timeline