“key” in the Douay-Rheims Bible

The word key appears 7 times in the Douay-Rheims Bible. The first 7 matching verses are shown below.

Judges 3:25 And waiting a long time, till they were ashamed, and seeing that no man opened the door, they took a key: and opening, they found their lord lying dead on the ground.
Canticle of Canticles 5:4 My beloved put his hand through the key hole, and my bowels were moved at his touch.
Isaias 22:22 And I will lay the key of the house of David upon his shoulder: and he shall open, and none shall shut: and he shall shut, and none shall open.
Luke 11:52 Woe to you lawyers, for you have taken away the key of knowledge. You yourselves have not entered in: and those that were entering in, you have hindered.
Apocalypse 3:7 And to the angel of the church of Philadelphia write: These things saith the Holy One and the true one, he that hath the key of David, he that openeth and no man shutteth, shutteth and no man openeth:
Apocalypse 9:1 And the fifth angel sounded the trumpet: and I saw a star fall from heaven upon the earth. And there was given to him the key of the bottomless pit.
Apocalypse 20:1 And I saw an angel coming down from heaven, having the key of the bottomless pit and a great chain in his hand.