"Bor^un", where the ^ is a glottal stop.

The glottal stop in the Hawaiian language is a sound made by closing the vocal cords briefly, creating a pause in speech. It is represented by the 'okina symbol (ʻ) in written Hawaiian and is an important element of proper pronunciation in the language. The glottal stop can change the meaning of words in Hawaiian, so it is crucial for learners to master its usage.

glottal stop

That is a figure in Arabic orthography representing the sound of a glottal stop, transliterated in English as an apostrophe