IPA: /nəˈwɑːb/
KK: /nɑːˈwɑːb/
A nawab is a title of nobility in South Asia, often used for a Muslim ruler or a high-ranking official, especially during the time of the British Raj.
The nawab ruled over the region with great authority and respect.
Nawab originates from the Persian word "naib" (meaning deputy or viceroy), which itself comes from the Arabic "na'ib" (meaning one who acts in place of another). The term was used in South Asia to denote a Muslim noble or a ruler, particularly in the context of the Mughal Empire.
Think of a 'deputy' ('naib') who acts in place of a ruler — that's why a 'nawab' refers to a noble or ruler in South Asia.