bengali
Synonym discussion
Sense: noun/1
Bengali can describe a person, a language, or something connected with the Bengal region. Bangladeshi is narrower: it is for nationality or things from Bangladesh, so it does not cover people or culture from West Bengal in India. Bangla is mainly another name for the language, not for a person. Bengal is the place name for the wider historical region, while Bengali names the people, the language, and related culture.
Etymology
English
Bengali comes from the place name Bengal and is used in English for the people, language, and things connected with that region.