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intr.v. sub·sid·ed, sub·sid·ing, sub·sides
a. To become less intense, active, or severe; abate.
b. To become smaller or less prominent, as swelling. See Synonyms at decrease.
2. To move or sink to a lower or normal level: The earth subsided as the aquifer drained away.
3. To sink to the bottom, as a sediment.
4. To sit down slowly; settle down: "She looked swiftly around, and once she saw her husband, subsided primly onto the edge of a chair" (Jane Stevenson).
sub·si′dence (səb-sīd′ns, sŭb′sĭ-dns) n.