noun, noun or participle which takes 'suru', transitive verb, noun which may take the genitive case particle 'no'
landlocked
Used for countries, regions, or bodies of water that have no direct access to the open sea. Also used in biology for fish populations that are confined to freshwater and cannot migrate to the sea.
スイスは陸封国です。
Switzerland is a landlocked country.
この湖には陸封型のサケが生息している。
Landlocked salmon inhabit this lake.