#1 subside v. [lessen] wear off or die down; "The pain subsided". wn
#2 subside v. sink to a lower level or form a depression; "the valleys subside". wn
#3 subside v. [settle] sink down or precipitate; "the mud subsides when the waters become calm". wn
#4 subside v. [sink] descend into or as if into some soft substance or place; "He sank into bed"; "She subsided into the chair". wn
vizzz