firth -
a long narrow estuary (especially in Scotland)
estuary the wide part of a river where it nears the sea; fresh and salt water mix
scotland one of the four countries that make up the United Kingdom of Great Britain and Northern Ireland; located on the northern part of the island of Great Britain; famous for bagpipes and plaids and kilts
Firth -
English linguist who contributed to linguistic semantics and to prosodic phonology and who was noted for his insistence on studying both sound and meaning in context (1890-1960)