debar in WordNet English dictionary

1. prevent the occurrence of; prevent from happening
   "Let's avoid a confrontation"; "head off a confrontation"; "avert a strike"
   debar  forefend  forfend  obviate  deflect  avert  head off  stave off  fend off  avoid  ward off 
   
2. prevent from entering; keep out
   "He was barred from membership in the club"
   bar  debar  exclude 
   
3. bar temporarily; from school, office, etc.
   suspend  debar