忆海
[yì hăi]
'忆' pertains to memories and reminiscences, while '海,' the sea/ocean, is used to metaphorically imply depth, breadth, and infinity. Putting them together conveys having a sea-like collection of recollections, endless, deep, and expansive, indicating someone immersed in rich personal histories or contemplation of many memories, akin to exploring boundless ocean depths of thoughts.