subsiding (Noun) — A gradual sinking to a lower level.
subsiding (Verb) — Wear off or die down. ex. "The pain subsided"
subsiding (Verb) — Sink to a lower level or form a depression. ex. "the valleys subside"
subsiding (Verb) — Sink down or precipitate. ex. "the mud subsides when the waters become calm"
subsiding (Verb) — Descend into or as if into some soft substance or place. ex. "She subsided into the chair"