Learn how to say Subsides correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word subside:
to become less loud, excited, violent, etc; abate
to sink or fall to a lower level
(of the surface of the earth, etc) to cave in; collapse
(of sediment, etc) to sink or descend to the bottom; settle
C17: from Latin subsīdere to settle down, from sub- down + sīdere to settle