Debar is a circumstance that would prevent something from happening: “Being born in a foreign country would debar the candidate from assuming the office of Prime minister in India.”
Disbar is to remove the status and privileges and obligations of someone who was a legal practitioner: “Making a fool out of his clients led to the lawyer being disbarred.”
“Her unethical practices were sufficient reasons to disbar her.”
The fact that she was born in a foreign country served to debar her from applying for the position; however, it did not disbar her from practicing medicine.
