Some people only have the problem when they run water in a sink or a bathtub. The source of the odor in almost all of these instances is a buildup of biofilm on the sides of the pipes that connect the sink or fixture to the actual P-shaped trap under the fixture.
Subsided is defined as  calmed down or sunk to a lower level. When the noise of a crowd dies down, this is an example of when the noisesubsided.
ceasing. 1  transitive verb. : 2  to cause to come to an end especially gradually : no longer continue they were forced to cease operations cease to exist. 3  intransitive verb.  1a : to come to an end the fighting gradually ceasedb : to bring an activity or action to an end : discontinue they have been ordered to cease and desist.