subside

[suhb-sahyd]
verb (used without object), subsided, subsiding.
1.
to sink to a low or lower level.
2.
to become quiet, less active, or less violent; abate: The laughter subsided.
3.
to sink or fall to the bottom; settle; precipitate: to cause coffee grounds to subside.

Origin:
1640–50; < Latin subsīdere, equivalent to sub- sub- + sīdere to sit, settle; akin to sedēre to be seated; see sit1

subsidence [suhb-sahyd-ns, suhb-si-dns] , noun
subsider, noun
nonsubsiding, adjective
unsubsided, adjective
unsubsiding, adjective

1. subside, subsist ; 2. subsidence, subsistence.


1. decline, descend, settle. 2. diminish, lessen, wane, ebb.


1. rise. 2. increase.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
subside (səbˈsaɪd)
 
vb
1.  to become less loud, excited, violent, etc; abate
2.  to sink or fall to a lower level
3.  (of the surface of the earth, etc) to cave in; collapse
4.  (of sediment, etc) to sink or descend to the bottom; settle
 
[C17: from Latin subsīdere to settle down, from sub- down + sīdere to settle]
 
sub'sider
 
n

subsidence (səbˈsaɪdəns, ˈsʌbsɪdəns)
 
n
1.  the act or process of subsiding or the condition of having subsided
2.  geology the gradual sinking of landforms to a lower level as a result of earth movements, mining operations, etc

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Etymonline
Word Origin & History

subside
1681, "to sink to the bottom," from L. subsidere "settle, sink, sit down or remain," from sub "down" + sidere "to settle," related to sedere (see sit). Meaning "to sink to a lower level, be reduced" is from 1706.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

subsidence sub·si·dence (səb-sīd'ns, sŭb'sĭ-dns)
n.
Sinking or settling in a bone, as of a prosthetic component of a total joint implant.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

subsidence

sinking of the Earth's surface in response to geologic or man-induced causes. When subsidence occurs in great belts, providing troughs for the accumulation of sediments, the resulting features are termed geosynclines; nonlinear subsidence produces basins and irregular depressions. Subsurface solution during cave formation may lead to a series of subsidence features at the ground surface, which, collectively, are termed karst (q.v.) topography. Similar effects can be produced by mining or by the extraction of water or petroleum by means of wells. Subsidence also has been produced by the irrigation of virgin areas of alluvial deposits; initial water penetration causes reorientation of constituent particles and a consequent compaction of sediment in the wetted areas. See also geosyncline.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Even without an earthquake the levees are increasingly vulnerable because of
  the continued subsidence and sea level rise.
By a slow intermittent subsidence, islet after islet sank beneath the verdant
  swamps.
In areas where accretion exceeds subsidence, new land is created.
The agency failed to take subsidence into account when building levees.
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