subside

sub·side

1. To sink to a lower or normal level.
2. To sink or settle down, as into a sofa.
3. To sink to the bottom, as a sediment.
4. To become less agitated or active; abate. See Synonyms at decrease.

Origin: Latin subsīdere : sub-, sub- + sīdere, to settle; see sed- in Indo-European roots.

Related Forms:

• subsidence sub·siˈdence (səb-sīdˈns, sŭbˈsĭ-dns) noun