Meaning
The kanji 汰 primarily refers to the action of "sifting," "selecting," or "filtering out" something. It evokes the image of separating what is valuable from what is worthless, the strong from the weak, or the new from the old.
This character often appears in contexts related to natural selection, culling, or the obsolescence of things that can no longer keep up with changes. It implies a process of elimination, which can lead to a refined or improved outcome, or conversely, a degeneration if not actively managed. Additionally, it can refer to washing or rinsing, especially when separating impurities.
The character 汰 is composed of two main parts. On the left is ⺡, the "water" radical. This radical commonly appears in kanji related to water, liquids, or actions involving water, such as washing, flowing, or purifying. On the right, we see 太, meaning "thick" or "big."
While "thick" might seem unrelated at first glance, ancient forms of 太 could also represent a person or something large being pushed or moved. When combined with the "water" radical, 汰 visually suggests washing or sifting something substantial in water to separate it. It can also imply a large volume of water causing things to be sorted or weeded out as they flow.
Consider the process of panning for gold: water is used to sift through sediment, leaving only the valuable ore. This visual connection to separation through liquid effectively reinforces its meaning of selection and filtering.
汰 has 7 strokes and is classified as an N1 level kanji. It is not part of the standard set of Kyouiku (grade school) kanji and is not commonly taught in lower levels of Japanese education, reflecting its more specialized usage in advanced vocabulary.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi reading for 汰 is タ (TA). This reading originates from its historical pronunciation in Chinese. It is almost exclusively used when 汰 forms part of a compound word with other kanji.
Within these compounds, it conveys the meaning of "sifting," "selection," or "elimination," often in a more abstract or systemic sense rather than a purely physical action.
- 淘汰 (tōta) — selection; culling; weeding out; survival of the fittest. This is perhaps the most common compound for 汰, frequently used in biological, economic, or social contexts.
- 選汰 (senta) — selection; choice; sorting. This compound emphasizes the act of choosing or sorting.
- 汰劣 (taretsu) — inferior selection; elimination of the inferior. This compound highlights the removal of less capable or poorer quality elements.
Kun'yomi (訓読み) — Native Japanese readings
While 汰 does have a listed Kun'yomi reading, よな-げる (yonageru), it is considerably less common in modern Japanese as a standalone verb or a direct reading of the kanji. When encountered, it carries the meaning of "to sift," "to pick out," or "to select by sifting."
This reading often describes a more literal, physical act of separation, such as sifting grains or washing something to remove impurities. For example, 米を汰げる means to sift rice to remove husks or impurities.
Another less common, almost archaic reading that sometimes appears in dictionaries is おご-る (ogoru), meaning "to be arrogant" or "to be proud." However, this reading for 汰 is extremely rare and primarily associated with kanji like 奢る (to be extravagant) or 傲る (to be arrogant). For practical N1 level understanding, focus on its On'yomi in compounds and the core meaning of selection or elimination.
- 汰げる (yonageru) — to sift; to select by sifting (e.g., rice, grains).
- 米を汰げる (kome o yonageru) — to sift rice (to remove impurities or husks).
Common Words & Compounds
The kanji 汰 is most frequently used in combination with other characters, forming powerful compounds that describe processes of selection, elimination, and refinement. While not as common as some other N1 kanji, its compounds are essential for understanding nuanced concepts in various fields.
General Selection & Culling
- 淘汰 (tōta) — selection; culling; weeding out; survival of the fittest. This is the most important compound for 汰, frequently used in biological, economic, or social contexts.
- 自然淘汰 (shizen tōta) — natural selection. A key term in biology and evolutionary theory, describing how organisms adapt to their environment.
- 市場淘汰 (shijō tōta) — market selection; elimination from the market. Describes how less competitive companies or products fail in a competitive marketplace.
- 競争淘汰 (kyōsō tōta) — competitive selection; elimination through competition. This term emphasizes the role of rivalry in determining survival.
- 適者淘汰 (tekisha tōta) — selection of the fittest. A direct translation of "survival of the fittest."
Purification & Filtering
- 選汰 (senta) — selection; choice; sorting. This term emphasizes the act of choosing or sorting out desirable items.
- 清汰 (seita) — cleaning out; purifying. Though less common, it implies the removal of impurities or undesirable elements to make something clean.
Obsolescence & Degeneration
- 汰廃 (tahai) — becoming obsolete; elimination. This often refers to outdated products, systems, or ideas that are no longer useful or relevant, such as obsolete software or old manufacturing techniques.
- 老朽汰 (rōkyūta) — obsolescence due to aging; deterioration. This specifically refers to things becoming unusable or outdated because of wear and tear or age, like old machinery or infrastructure.
Specific or Less Common Usage
- 汰げる (yonageru) — to sift; to select by sifting. While a kun'yomi, it appears in its verb form, typically referring to physical sifting processes, like sifting rice.
Example Sentences
市場競争は、最終的に弱い企業を淘汰する。
Shijō kyōsō wa, saishūteki ni yowai kigyō o tōta suru.
Market competition ultimately weeds out weak companies.
自然淘汰によって、強い種だけが生き残る。
Shizen tōta ni yotte, tsuyoi shu dake ga ikinokoru.
Through natural selection, only strong species survive.
古い技術は時代の流れによって淘汰されていく。
Furui gijutsu wa jidai no nagare ni yotte tōta sarete iku.
Old technologies are eliminated by the flow of time.
人事部は入社試験で優秀な人材を選汰する。
Jinji-bu wa nyūsha shiken de yūshū na jinzai o senta suru.
The HR department selects excellent personnel through the entrance exam.
彼の傲慢な態度は、いずれ彼を社会から淘汰するだろう。
Kare no gōman na taido wa, izure kare o shakai kara tōta surō.
His arrogant attitude will eventually lead to his elimination from society.
この新しいシステムは、不要なデータを自動的に淘汰する機能がある。
Kono atarashii shisutemu wa, fuyō na dēta o jidōteki ni tōta suru kinō ga aru.
This new system has a function to automatically weed out unnecessary data.
技術革新は、古いモデルの製品を淘汰していく宿命にある。
Gijutsu kakushin wa, furui moderu no seihin o tōta shite iku shukumei ni aru.
Technological innovation is destined to phase out old product models.
競争が激化し、多くのスタートアップが淘汰された。
Kyōsō ga gekka shi, ooku no sutātoappu ga tōta sareta.
Competition intensified, and many startups were eliminated.
品質基準を満たさない製品は、厳しく淘汰されるべきだ。
Hinshitsu kijun o mitasanai seihin wa, kibishiku tōta sareru beki da.
Products that do not meet quality standards should be strictly weeded out.
時間とともに、不必要なものは自然と淘汰される。
Jikan to tomo ni, fuhitsuyō na mono wa shizen to tōta sareru.
Over time, unnecessary things are naturally eliminated.
Memory Tip
To remember 汰, let's break it down into its components! On the left, we have the "water" radical ⺡, which looks like three drops of water or a flowing stream. On the right, we have 太, meaning "big" or "thick."
Imagine a "big" (太) pile of something in a stream of "water" (⺡). The water is used to "sift" or "wash away" the impurities, leaving only the good stuff behind. So, think of "water" sifting "big" amounts, or a "big" thing being "sifted" by "water." This visual of separating things with water clearly links to its meaning of selection and elimination, much like how gold panners use water to sift out valuable gold from dirt.