This is the 9918th most frequent German word.
offene
"Offene" means "open" in English.
In this sentence, 'offene' is the feminine singular nominative form of 'offen' (open) and functions as an attributive adjective modifying the noun 'Tür' (door).
Die offene Tür lud uns ein, hereinzukommen.
The open door invited us to come in.
'Offene' is used attributively here to describe 'Haltung' (attitude), emphasizing transparency or a welcoming disposition in the feminine singular accusative form.
Während des Gesprächs zeigte sie eine offene Haltung.
During the conversation, she displayed an open attitude.
Here, 'offene' is the feminine singular accusative case, describing 'Landschaft' (landscape) as being unconfined or not enclosed.