This is the 1054th most frequent German word.
tür
Door.
The word 'Tür' is used as a noun referring to a physical door.
Die Tür ist geschlossen.
The door is closed.
The word 'Tür' is used as a direct object in context with the verb 'öffnen', meaning 'to open'.
Kannst du die Tür öffnen?
Can you open the door?
The word 'Tür' is part of a prepositional phrase 'vor der Tür', indicating location relative to the door.