Phonetically -- "NGAKKH loj-mit"

Idiom. Literally: The Door is Locked = The situation has an unavoidable outcome, plans cannot be changed, there's nothing anyone can do about it.

A door is seen as a symbol of escape, so to say that the door is locked means that there is no escape route, thus, that plans cannot be changed or that an outcome is unavoidable.

(click arrow to hear it again)