What is another word for most thick-headed?
Pronunciation: [mˈə͡ʊst θˈɪkhˈɛdɪd] (IPA) 
When it comes to describing someone who is incredibly stubborn and refuses to change their mind, the term "most thick-headed" is certainly appropriate. However, there are a variety of synonyms that can be used as well, depending on the context and level of offensiveness desired. Some milder options might include "hardheaded," "inflexible," or "obstinate." More strongly worded alternatives could include "bullheaded," "pigheaded," or "mulish." Ultimately, which word you choose depends on the situation and the tone you want to convey. But any way you slice it, anyone who is described with one of these synonyms is likely someone who is very difficult to persuade or convince.
