You know when you cross that threshold, there's no going back.
He stopped at the threshold and asked in Russian whether Drubetskoy lived there.
Crossing the threshold into the bathroom, she paused to look at herself in the mirror with a grimace.
As he passes the threshold his future mother-in-law meets him with a tray filled with fruits and rice, which she strews at his feet.
If from habit and tradition he respects a stranger within his threshold, he yet considers it legitimate to warn a neighbour of the prey that is afoot, or even to overtake and plunder his guest after he has quitted his roof.