precipitates
沈殿する
解説 Definition
化学で溶液から固体が分離して沈むこと。また、物事を急激に引き起こすという意味もある。
As the third-person singular present form of precipitate, precipitates means that something causes a dissolved substance to separate from a solution as a solid, or that an event suddenly causes a serious situation or consequence to occur.
覚え方のコツ Memory Tip
precipitates は原形 precipitate の三人称単数現在形で、語末に -s を付け、発音は /prɪˈsɪpɪteɪts/ と最後が「ツ」に近い無声音になる。化学では「溶液から固体を沈殿させる」、一般には crisis precipitates unrest のように「急に引き起こす」と覚える。
Precipitates is the third-person singular present form of precipitate: add -s because the subject is singular, as in “acid precipitates a solid.” The ending is pronounced /ts/, not /z/. Keep one core image: something is made to fall out or happen abruptly. In chemistry, a substance comes out of solution as a solid; in general use, a crisis can precipitate unrest by bringing it about suddenly. Typical patterns are “precipitates crystals from a solution” and “precipitates a crisis.”
例文
Adding acid to the solution precipitates a white solid that can be filtered out.
溶液に酸を加えると、白い固体が沈殿し、ろ過することができる。
A sudden economic crisis often precipitates widespread social unrest.
突然の経済危機は、しばしば広範な社会不安を引き起こす。
The cold temperature precipitates the salt crystals from the saturated solution.
低温が飽和溶液から塩の結晶を沈殿させる。
precipitates の類義語・関連語
類義語
対義語
紛らわしい語
precipitates の語源・成り立ち Etymology
precipitates は precipitate に由来し、ラテン語 prae-「前へ」+ caput「頭」からできた praecipitare「真っ逆さまに落とす」が語源です。「頭から落ちる」像が、化学で物質が下へ落ちて沈殿する意味につながり、precipice や capital も縁語です。
Precipitates is formed from precipitate plus the third-person singular ending -s. Precipitate ultimately comes from Latin praecipitare, meaning “to throw headlong,” related to prae-, “before or forward,” and caput, “head.” The image of a sudden downward fall developed into the senses of bringing an event about abruptly and causing solid matter to separate from a solution. Precipice and capital share historical connections with the Latin element for “head.”
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