'Locked' in the Bible

And Ehud went out the vestibule, and he closed the doors of the upper room and locked [them] behind him.

After he left, his servants returned. When they saw [that] the doors of the upper room [were] locked, {they thought}, "Surely he [is] {relieving himself} in the cool inner room."

A garden locked [is] my sister bride, a spring enclosed, a fountain sealed.

But [if] I say, "I will not mention him and I will no longer speak in his name," then it becomes in my heart like a fire burning, locked up in my bones, and I struggle to contain [it], and I am not able.