1 below the water 沉没的: a sunken ship 沉船

2 (used about cheeks or eyes) very far into the face as a result of illness or age （指面颊或眼睛）凹陷的

3 at a lower level than the surrounding area 凹的（低于周围）: a sunken bath/garden 沉降式浴缸╱花园