Correct spelling for the English word "banni" is [bˈani], [bˈani], [b_ˈa_n_i] (IPA phonetic alphabet).
The word "banni" has its roots in the Old French verb "banir", which means "to banish" or "to exile". It entered the English language in the late 13th century as "bannisshen", and later evolved into "bannish" and "banish". The term "banni" is derived from the past participle form of the verb, "banni" in Old French, indicating a state of being banished or exiled. The word has since been adopted into various languages, including English, with the same or similar meaning.