To subside is to die down or become less violent, like rough ocean waves after a storm has passed (or your seasickness, if you happened to be sailing on that ocean).

Subside comes from the Latin prefix sub- (meaning "down") and the Latin verb sidere (meaning "to settle"). Subside is often used when a negative situation has improved significantly. For example, violence, disease, and unemployment can all subside. Here's hoping that they do.

Definitions of subside

v wear off or die down

“The pain subsided
Type of:
become weaker

v sink to a lower level or form a depression

“the valleys subside
Type of:
dip, sink
appear to move downward

v descend into or as if into some soft substance or place

“She subsided into the chair”
Type of:
come down, descend, fall, go down
move downward and lower, but not necessarily all the way

v sink down or precipitate

“the mud subsides when the waters become calm”
Type of:
go down, go under, settle, sink
go under, "The raft sank and its occupants drowned"

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