noun
firth
FURTH/fɜːrθ/
A narrow inlet of the sea, especially in Scotland.
The tidal firth opens toward the sea between low wooded hills.

Etymology
Old Norse fjörðr named an inlet or estuary. Firth preserves that meeting of sea and land in its Scottish use for a coastal inlet or river mouth.
In context
he ordered his fleet to continue pursuing the enemy until the Firth of Forth on the Scottish coast.
More examples
- The Scottish village overlooks a sheltered firth.
- A bridge spans the firth near its mouth.
- Seals gather along the shores of these firths.
Forms
firth · firths