Nawab
/nəˈwɑːb/
Definition 1 of 2
Pro Tip 1/3Historical Relevance
Understand 'nawab' was used during a specific time in history, not for current officials. 
The nawab played a key role in historical accounts of Mughal administration.
Pro Tip 2/3Not a Title
'Nawab' is a position, not a formal title like 'Mr.' or 'Dr.' so don't use it as such. 
They referred to the official as the nawab, not Nawab Smith.
Pro Tip 3/3Respectful Address
The term can connote respect for someone's authority during the Mughal period. 
People showed respect when speaking of the nawab and his decisions.