Dim-witted and Hidebound

Dim-witted adjective - Not having or showing an ability to absorb ideas readily.

Hidebound and dim-witted are semantically related. In some cases you can use "Hidebound" instead an adjective phrase "Dim-witted".

Hidebound adjective - Tending to favor established ideas, conditions, or institutions.

Dim-witted and hidebound are semantically related. Sometimes you can replace phrase "Dim-witted" with "Hidebound", this terms are similar.