Door
Hinged Door
noun
Like the kanji, this means door, and more specifically a hinged door, including the kind found on gates and panels that swing open.
This word is made up of a single kanji, so you know it'll probably use the kun'yomi reading. Fortunately, that's the とびら reading you learned with the kanji!
おい、ふざけている場合か！扉を開けろ！
Hey, this isn't funny! Open the door!