sunk ‧ en /ˈsʌŋkən/ BrE AmE adjective
[ Date: 1300-1400 ; Origin: From an old past participle of sink ]
1 . [only before noun] having fallen to the bottom of the sea, a lake, or a river:
the wrecks of sunken ships
sunken treasure
2 . sunken cheeks/eyes etc cheeks or eyes that have fallen inwards, especially because of age or illness SYN hollow :
Her eyes looked dull and sunken.
3 . [only before noun] built or placed at a lower level than the surrounding floor or ground:
Steps led down to a sunken garden.
a sunken bath