Sunken Definition

sŭngkən
adjective
Submerged.
A sunken ship.
Webster's New World
Fallen in; hollow.
Sunken cheeks.
Webster's New World
Below the level of the surrounding or adjoining area.
A sunken patio.
Webster's New World
Depressed; dejected.
Sunken spirits.
Webster's New World

Caused, by natural or unnatural means, to be submerged.

Wiktionary
Synonyms:
verb

Sink.

Webster's New World

(archaic) Past participle of sink.

Wiktionary