The act of preventing or hindering; obstruction of action, access, or approach; thwarting.
precaution; forethought.
Any measure intended to limit health-related risks (such as information campaigns, vaccination, early diagnosis etc.).
The act of something that stops; a halt.
Material for filling a cavity.
A partition or door to direct or prevent a current of air.
A pad or poultice of dung or other material applied to a horse's hoof to keep it moist.