mijnheer

/maɪnˈhɪər/
noun
  1. A Dutch title of address equivalent to 'Mr.' or 'sir,' used before a man's name or as a polite form of address.
    • Mijnheer van der Waals welcomed us into his home.
    • In the Netherlands, it is polite to say 'Mijnheer' when speaking to an older man.
    • The letter was addressed to Mijnheer de Vries.