"subside" in the verb sense
1. subside, lessen
wear off or die down
"The pain subsided"
2. subside
sink to a lower level or form a depression
"the valleys subside"
3. subside, settle
sink down or precipitate
"the mud subsides when the waters become calm"
4. sink, subside
descend into or as if into some soft substance or place
"He sank into bed"
"She subsided into the chair"
Source: WordNet® (An amazing lexical database of English)
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