undertenant

/ˈʌndərˌtɛnənt/
noun
  1. A person who rents a property from someone who is already renting it from the owner.
    • As an undertenant, she paid rent to the leaseholder, not the landlord.
    • The contract allowed the tenant to take on an undertenant with the owner's permission.
    • The main tenant found an undertenant to share the apartment.
Antonyms