Knuckleheaded
Knuckleheaded adjective - Not having or showing an ability to absorb ideas readily.
Usage example: the editorial lampooned the knuckleheaded legislation, which was yet another attempt by the government to protect people from themselves
Opaque and knuckleheaded are semantically related. In some cases you can use "Opaque" instead an adjective "Knuckleheaded".
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
Knuckleheaded and opaque are semantically related. Sometimes you can use "Knuckleheaded" instead an adjective "Opaque".
Nearby Words: opaqueness, opaquely
Cite this Source
Opaque and Knuckleheaded. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/knuckleheaded/opaque
Knuckleheaded & Opaque. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/knuckleheaded/opaque>.
Opaque or Knuckleheaded. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/knuckleheaded/opaque.
Google Ngram Viewer shows how "knuckleheaded" and "opaque" have occurred on timeline