go under go under /ɡoʊ ˈʌndər/

verb

1. () Go under  ( go under , sink , settle , go down )
   go under
    The raft sank and its occupants drowned
   The raft sank and its occupants drowned
   
2. Be called; go by a certain name  ( go under , go by )
   be called; go by a certain name
    She goes by her maiden name again
   She goes by her maiden name again
   
3. Disappear beyond the horizon  ( go down , go under , set )
   disappear beyond the horizon
    The sun sets early these days
   the sun sets early these days