ETYM French département, from départir. Related to Depart.
1. A specialized division of a large organization; SYN. section.
2. A specialized sphere of knowledge.
3. The territorial and administrative division of some countries (such as France).

ETYM Latin ministerium. Related to Minister, Mystery a trade.
1. A government department under the direction of a minister.
2. Religious ministers collectively (especially Presbyterian).
3. The building where the business of a government ministry is transacted.