dogmat
Dogmat is a term with roots in Greek, meaning an opinion or a tenet. In a philosophical or religious context, a dogmat refers to a principle or a set of principles that are considered to be established truths, often without the need for further proof or questioning. These principles are typically presented as foundational beliefs within a particular system of thought. The term can also be used more generally to describe any firmly held belief or assertion.
When a person is described as dogmatic, it implies they hold their beliefs with an unyielding conviction
However, it is important to distinguish between a dogmat as a foundational principle within a belief system