subside
v.
1680s, of objects, "to sink to the bottom," from Latin subsidere "sit down, settle, sink, fall; remain; crouch down, squat," from sub "down" (see sub-) + sidere "to settle," related to sedere "to sit" (see sedentary). Of liquid surfaces, "to sink to a lower level, be reduced" from 1706. Related: Subsided; subsiding.
〔蒋〕[sub-下,sid坐;’坐下”→沉下] 沉降,沉淀;[‘坐下”→落下→沉静下来,平静下来] 平息
〔李〕[sub-=under, down下;sid=to sit or settle坐,停留;-e→“to settle down停在下面,停息”→] v.① sink down下沉;沉降