Synonyms for go under
Synonyms for (verb) go under
Definition: disappear beyond the horizon
Usage: the sun sets early these days
Definition: move downward and lower, but not necessarily all the way
Usage: The temperature is going down; The barometer is falling; The curtain fell on the diva; Her hand went up and then fell again
Definition: go under, "The raft sank and its occupants drowned"