dogmatic
[adjective]
Synonyms: opinionated, arrogant, assertive, doctrinaire, emphatic, obdurate, overbearing

[TahlilGaran] English Synonym Dictionary ▲

dog‧mat‧ic /dɒɡˈmætɪk $ dɒːɡ-, dɑːɡ-/ adjective
someone who is dogmatic is completely certain of their beliefs and expects other people to accept them without arguing:
Her staff find her bossy and dogmatic.
—dogmatically /-kli/ adverb
—dogmatism /ˈdɒɡmətɪzəm $ ˈdɒːɡ-, ˈdɑːɡ-/ noun [uncountable]:
the narrow dogmatism of the past
—dogmatist noun [countable]

[TahlilGaran] Dictionary of Contemporary English ▲