go under (
http://definr.com/go under)
v 1: go under, "The raft sank and its occupants drowned" [syn:
sink,
settle,
go down] [ant:
float]
2: disappear beyond the horizon; of celestial bodies such as
the sun and the moon [syn:
set,
go down] [ant:
rise]
3: be called; go by a certain name; "She goes by her maiden
name again" [syn:
go by]