φυλακὴν [10 verses](noun sg fem acc ) "Prison" is phylake, which means "a watching or guarding," "a guard," "a ward," "a watch," " "a station," "a post," "a keeping," "a preserving," "safekeeping," "a safe-guard," and "a precaution."  - "Prison" is from a noun, that means a "watch," "watcher," "guard," "chain," "keeper," and "a place where people are watched." This form is found only in the NT where it is clearly used to mean prison.