consul
Word family
Synonym discussion
Sense: noun/1
All three words describe someone who represents their country abroad, but their roles differ in rank and scope. A diplomat is the broadest term — any person whose job is managing international relations. An ambassador is the highest-ranking diplomat, based in a capital city, speaking directly for the head of state. A consul works in a major foreign city (not necessarily a capital) and handles practical services for citizens — issuing passports, helping travellers in trouble, and promoting trade. For instance, if your passport is stolen in Barcelona, you would go to the consul at the consulate, not the Spanish government. If two countries are negotiating a peace treaty, the ambassador would lead those talks.
Etymology
The word consul comes from Latin 'consul', meaning a Roman magistrate. It is related to 'consulere', meaning 'to deliberate' or 'to take counsel', because the consuls were the officials who consulted the Senate and made decisions for the Roman people. The modern sense of a government representative in a foreign city comes from the late Middle Ages, when Italian city-states sent 'consuls' to look after their merchants in foreign ports.