1. Dark and dismal as of the rivers Acheron and Styx in Hades
   - Acheronian, Stygian

See also: dark

• freezing mixture
• freezing point
• Fregata
• Fregatidae
• Freiburg
• freight
• freight agent
• freight car
• freight elevator
• freight liner
• freight rate
• freight train
• freightage
• freighter
• Fremont
• Fremontia
• Fremontodendron
• French
• French Academy
• French and Indian War
• French bean
• French blue
• French bracken
• French bread
• French bulldog