unsubsiding

verb (used without object), sub·sid·ed, sub·sid·ing.

1. to sink to a low or lower level.
2. to become quiet, less active, or less violent; abate: The laughter subsided.
3. to sink or fall to the bottom; settle; precipitate: to cause coffee grounds to subside.

verb (intr)

1. to become less loud, excited, violent, etc; abate
2. to sink or fall to a lower level
3. (of the surface of the earth, etc) to cave in; collapse
4. (of sediment, etc) to sink or descend to the bottom; settle

v.1680s, “to sink to the bottom,” from Latin subsidere “settle, sink, sit down or remain,” from sub “down” (see sub-) + sidere “to settle,” related to sedere (see sedentary). Meaning “to sink to a lower level, be reduced” is from 1706. Related: Subsided; subsiding.