"debar" in the verb sense
1. suspend, debar
bar temporarily from school, office, etc.
2. debar, forefend, forfend, obviate, deflect, avert, head off, stave off, fend off, avoid, ward off
prevent the occurrence of prevent from happening
"Let's avoid a confrontation"
"head off a confrontation"
"avert a strike"
3. bar, debar, exclude
prevent from entering keep out
"He was barred from membership in the club"
Source: WordNet® (An amazing lexical database of English)
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