Meaning
The kanji 克 (koku, katsu) primarily means 'overcome,' 'conquer,' or 'subdue.' It implies a struggle against an external force or an internal challenge, leading to triumph or mastery. Beyond physical conquest, it also applies to 'self-control' or 'self-restraint,' referring to overcoming one's own desires or impulses. In some contexts, it can even describe someone 'highly skilled' or 'able,' suggesting mastery over a task or situation.
Originally an ideogram, 克's visual form is often interpreted as a combination of elements. The top part resembles 兄 (older brother), which can suggest strength, capability, or superiority. The bottom part is 儿 (human legs or a person), representing an individual. A common interpretation depicts a person (儿) exerting full strength, or even using a weapon (symbolized by the cross-like stroke in 兄), to overpower or conquer. This visual depiction strongly aligns with the concept of an individual's struggle and eventual mastery over an obstacle. The character vividly captures the essence of prevailing through effort.
The kanji 克 has 7 strokes and is classified as a Grade 8 kanji in the Japanese education system, meaning junior high school students typically learn it as part of the Jōyō kanji set. This makes it an essential character for understanding nuanced Japanese expressions related to overcoming challenges and self-mastery.
Readings
On'yomi (音読み) — Chinese-derived readings
The on'yomi reading of 克 is コク (koku). Derived from its Chinese pronunciation, this reading is primarily used in compound words, often conveying abstract or formal concepts of overcoming or controlling.
克服 (kokufuku) — This is a very common compound, meaning 'overcoming,' 'conquest,' or 'subduing.' It frequently appears in contexts such as overcoming difficulties, diseases, or weaknesses. For example, 病気を克服する (byōki o kokufuku suru - to overcome an illness).
克己 (kokki) — Meaning 'self-control,' 'self-denial,' or 'self-conquest.' This compound emphasizes the control of one's own desires, impulses, or ego, reflecting the internal struggle for self-mastery. For instance, 克己心 (kokkishin - self-control/self-restraint).
相克 (sōkoku) — This term refers to 'mutual antagonism,' 'conflict,' or 'rivalry.' It describes a state of constant struggle between two forces or entities. For example, 生き残りをかけた相克 (ikinokori o kaketa sōkoku - a struggle for survival).
Kun'yomi (訓読み) — Native Japanese readings
The primary kun'yomi reading for 克 is かつ (katsu), primarily used when 克 functions as a native Japanese verb, most commonly seen as 克つ (katsu).
克つ (katsu) — This verb means 'to overcome,' 'to conquer,' or 'to prevail.' While similar to 勝つ (katsu - to win), 克つ specifically implies overcoming a specific difficulty, challenge, or adversary through effort and resolve, often carrying a nuance of enduring or prevailing against odds. For example, 困難に克つ (konnan ni katsu - to overcome difficulties).
自ら克る (mizukara katsuru) — A more literary or archaic expression meaning 'to overcome oneself' or 'to achieve self-conquest.' It highlights the internal battle to control one's own nature or desires.
克て (katsute) — This is an adverb meaning 'formerly,' 'once,' or 'before.' Though it might seem unrelated at first glance, its etymology links to 'having overcome' or 'having been victorious in the past,' indicating something that occurred in a previous time. For instance, 克て有名な作家だった (katsute yūmei na sakka datta - he was once a famous writer).
Common Words & Compounds
Here are additional common words and compounds featuring the kanji 克, showcasing its versatile applications in Japanese vocabulary:
克服 (kokufuku) — Overcoming, conquest, subduing. This fundamental compound expresses the act of successfully dealing with a challenge or problem. You'll frequently encounter it in news, academic texts, and everyday conversation.
克己 (kokki) — Self-control, self-denial, self-mastery. A crucial concept in personal development and ethical thought, it emphasizes the power to control one's own desires and impulses.
相克 (sōkoku) — Mutual antagonism, conflict, rivalry. This word describes a state of ongoing opposition or struggle between two parties or ideas, often without a clear victor.
克己心 (kokkishin) — Spirit of self-control, self-restraint. Adding 心 (heart/spirit) to 克己 emphasizes the mental fortitude and inner strength required for self-mastery.
克つ (katsu) — To overcome, to conquer, to prevail. This verb form indicates the direct action of overcoming a specific obstacle or adversity.
克明 (kokumei) — Detailed, precise, painstaking, conscientious. This word describes a careful and thorough approach, often implying the meticulous effort required to master or understand something fully. It extends the meaning of 'ability' to encompass 'careful skill'.
克明に (kokumei ni) — Meticulously, conscientiously. The adverbial form of 克明, used to describe actions performed with meticulous care and detail.
克て (katsute) — Formerly, once, before. This important adverb refers to past events or states, suggesting a time when something prevailed or was true.
克服困難 (kokufuku konnan) — Difficult to overcome. This compound refers to a challenge that presents significant difficulty in being surmounted.
己に克つ (onore ni katsu) — To overcome oneself. This is a classical expression for achieving self-mastery over one's own weaknesses or desires.
Example Sentences
彼は病気を克服した。
Kare wa byōki o kokufuku shita.
He overcame his illness.
私たちは困難に克つべきだ。
Watashitachi wa konnan ni katsu beki da.
We should overcome difficulties.
克己心は成功のために重要だ。
Kokkishin wa seikō no tame ni jūyō da.
Self-control is important for success.
克てこの場所には古い城があった。
Katsute kono basho ni wa furui shiro ga atta.
There used to be an old castle in this place.
恐怖を克服することが最初の一歩だ。
Kyōfu o kokufuku suru koto ga saisho no ippo da.
Overcoming fear is the first step.
二つの文化の間には長い相克があった。
Futatsu no bunka no aida ni wa nagai sōkoku ga atta.
There was a long conflict between the two cultures.
彼の克明な説明で皆が理解できた。
Kare no kokumei na setsumei de mina ga rikai dekita.
Everyone understood thanks to his detailed explanation.
研究者たちは、難問に克明に取り組んだ。
Kenkyūsha-tachi wa, nanmon ni kokumei ni torikunda.
The researchers meticulously tackled the difficult problem.
人生の試練を克ち抜く力が大切だ。
Jinsei no shiren o kachinuku chikara ga taisetsu da.
The strength to overcome life's trials is important.
Memory Tip
To remember 克, consider its visual components. The top part looks like 兄 (older brother), and the bottom part is 儿 (legs or person). Imagine a strong, capable 兄さん (older brother) standing firmly on his 足 (legs), demonstrating his ability to 'overcome' or 'conquer' any challenge. He's so strong, he can even conquer himself (practicing self-control)! Alternatively, you can visualize an individual (儿) holding an 'axe' (the 十-like stroke in 兄) above their head, ready to 'cut through' and 'overcome' obstacles. The image of a determined person mastering a situation or their own impulses is central to understanding this kanji's meaning.