This is the 617th most frequent Urdu word.
نائب
Deputy or assistant.
In this sentence, 'نائب' (na'ib) is used to refer to a 'deputy,' someone who acts on behalf of another.
انہوں نے اپنے نائب کو تمام ذمہ داریوں کا وقف دیا۔
They delegated all the responsibilities to their deputy.
Here, 'نائب' is part of the compound title 'نائب صدر' (na'ib-e-sadr), meaning 'vice president,' showing the role of second in command to the president.
نائب صدر نے تقریب سے خطاب کیا۔
The vice president addressed the ceremony.
In this instance, 'نائب' is used in an academic context to denote a monitor or representative chosen for responsibility.