Noah Webster
Threshhold
THRESH'HOLD, noun
1. The door-sill; the plank, stone or piece of timber which lies at the bottom or under a door, particularly of a dwelling house, church, temple or the like; hence, entrance; gate; door.
2. Entrance; the place or point of entering or beginning. He is now at the threshhold of his argument.
Many men that stumble at the threshhold