Noah Webster
Preclude
PRECLU'DE, verb transitive [Latin proecludo; proe, before, and cludo, claudo, to shut.]
1. To prevent from entering by previously shutting the passage, or by any previous measures; hence, to hinder from access, possession or enjoyment. Sin, by its very nature, precludes the sinner from heaven; it precludes the enjoyment of God's favor; or it precludes the favor of God.
The valves preclude the blood from entering the veins.
2. To prevent from happening or taking place.