/səbˈsaɪd/
sub·side
BrE /səbˈsaɪd/
NAmE /səbˈsaɪd/
[I]
to become calmer or quieter
She waited nervously for his anger to subside.
I took an aspirin and the pain gradually subsided.
[I] (of water)
to go back to a normal level
The flood waters gradually subsided.
[I] (of land or a building)
to sink to a lower level; to sink lower into the ground
Weak foundations caused the house to subside.