Fragile and weak. A formal word used in forms like 「脆弱性」「脆弱な体制」, referring not only to physical weakness but also to flaws in organizations, systems, or structures. It begins not with 「せ」 but with the voiced 「ぜ」.
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N1, N2精神せいしん
The workings of the human mind and consciousness; the mental side as opposed to the body. 精神的に疲れる (mentally tired). Also means the idea at the root of something, as in チームの精神 (the team's spirit).
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N3成人せいじん
adult. To become an adult. Also, a person who has become an adult. In Japan, one becomes an adult from age 18.
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N1制するせいする
The act of suppressing an opponent to dominate, or restraining one's own emotions or actions. A formal word used in forms like 「試合を制する」「怒りを制する」, in the sense of winning a contest or exercising self-control.
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N3成績せいせき
The result of study, work, a match, etc. Example: 「成績が上がる」 (grades/results improve).
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N1整然せいぜん
The state in which things are arranged in proper order and orderly fashion. A formal word used in forms like 「整然と並ぶ」「整然とした論理」, expressing an orderly state without disorder.
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N3成長せいちょう
growth. For a person or living thing to grow and become bigger. Example: 「子どもの成長」 (a child's growth). Also used to mean an economy or company growing larger, as in 「経済成長」 (economic growth).
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N1制定せいてい
The act of officially establishing laws, regulations, or systems. A formal word used in forms like 「法律を制定する」「憲法を制定する」, referring to the formal establishment by public authorities.
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N5生徒せいと
A person who studies at school. Often refers to someone learning at a junior high or high school. For university, 「学生」 is used.
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N3青年せいねん
A young person around 20 years old. Especially often used for males. Example: 「青年時代」 (one's youth).
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N1成敗せいばい
The act of punishing and chastising those who have done evil. A formal word used in period dramas or historical contexts, also used verbally in the form 「成敗する」. In modern usage it is often used metaphorically, as in 「悪を成敗する」.
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N3政府せいふ
government. The organization that carries out the politics of a country. Example: 「日本政府」 (the Japanese government).
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N3制服せいふく
uniform. Clothing that is decided to be worn at a school, company, etc.
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N3生物せいぶつ
Living things overall, including animals and plants. When read 「なまもの」, it means food that has not been cooked.
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N3性別せいべつ
gender. The distinction between male and female. Example: 「性別を問わない」 (regardless of gender).
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N2, N3生命せいめい
Life. Often used in written language or set expressions such as 「生命保険」 (life insurance); in spoken language, 「命」 is normal.
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N4西洋せいよう
Countries of Europe and America. The antonym is 「東洋」 (the East/Asia).
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N2, N3整理せいり
To neatly tidy up things that are scattered around. Example: 「机の上を整理する」 (to tidy up a desk). Also used to mean organizing thoughts or information in an understandable way, as in 「問題点を整理する」 (to organize the problem points).
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N3背負うせおう
The act of carrying something on one's back. The act of taking on responsibility, burden, or fate. Used in forms like 「荷物を背負う」「責任を背負う」, in both physical and metaphorical senses.
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N4世界せかい
world. The whole earth, all countries and people.
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N3せきせき
To forcefully expel breath from the throat. Example: 「せきが出る」 (to cough). Written with the kanji 「咳」, but since this kanji is not used in daily life, it is usually written in hiragana.
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N4席せき
seat. A place to sit. In the form 「〜席」 it is also used as a word for counting seats.
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N3責任せきにん
responsibility. A duty one has taken on and must carry through. Example: 「責任がある」 (to bear responsibility). Also used to mean accepting the consequences of a failure, as in 「責任を取る」 (to take responsibility).
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N1惜敗せきはい
The act of losing by a narrow margin. A formal word used in forms like 「一点差で惜敗する」, used when one has fought well but lost narrowly in competitions such as sports, matches, or elections.
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N1責務せきむ
A duty that must be carried out with responsibility. A formal word used in forms like 「責務を果たす」「責務を負う」, referring to public or professional obligations.
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N3石油せきゆ
petroleum. Oil extracted from underground. It becomes a raw material for fuel and plastics.
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N3積極的せっきょくてき
A state of doing things on one's own initiative. Example: 「積極的に発言する」 (to speak up proactively). The antonym is 「消極的」 (passive).
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N1絶句ぜっく
The state of being unable to speak due to surprise or shock. A formal word used in forms like 「思わず絶句する」, expressing being unable to respond when faced with an unexpected situation.
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N5せっけんせっけん
soap. Something used to wash the body or hands. Written with the kanji 「石鹸」, but usually written in hiragana in daily life.
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N1切実せつじつ
The state of feeling something keenly and strongly. Being pressing and important. A formal word used in forms like 「切実な問題」「切実に願う」, expressing weight that directly affects oneself or a heartfelt sentiment.
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N1折衝せっしょう
The act of negotiating and seeking adjustment with parties whose interests conflict. A formal word used in official settings such as diplomacy, business, or labor-management relations, in forms like 「折衝を重ねる」「折衝に当たる」.
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N1切々せつせつ
The state of expressing feelings poignantly, as if appealing deeply to the heart. A formal word used in forms like 「切々と訴える」「切々たる思い」, used in scenes of conveying sorrow, wishes, or affection so that they sink deeply into the listener.
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N1節操せっそう
An attitude of maintaining one's beliefs or principles to the end. A formal word used in forms like 「節操がない」「節操を守る」, questioning the presence or absence of consistent attitude and conviction. Often used in negative sentences.
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N1絶大ぜつだい
A very large degree. A formal word used in forms like 「絶大な人気」「絶大な支持」, expressing the great scale of influence or effect. Mainly used in positive contexts.
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N3絶対ぜったい
absolutely. No matter what, without fail. Example: 「絶対に行く」 (I will definitely go). When used with a negative form, it means "never," as in 「絶対にしない」 (I will never do it).
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N1折衷せっちゅう
The act of taking the best parts of two or more differing positions or proposals and combining them into one. A formal word used in forms like 「折衷案」「和洋折衷」, with the meaning of reconciling oppositions or differences to create a middle-ground solution.
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N1絶頂ぜっちょう
Originally refers to the highest peak of a mountain. By extension, it means the period when the momentum or state of something is at its most flourishing, reaching its peak. Used in contexts indicating the highest point of glory, happiness, or prosperity, as in 「人気の絶頂」「絶頂期」. A formal word.
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N1節度せつど
An appropriate measure that does not go too far. A formal word used in forms like 「節度を守る」「節度ある行動」, expressing a sensible attitude that does not exceed proper limits.
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N1刹那せつな
A very brief moment, an instant. A formal word of Buddhist origin, used in forms like 「刹那的」「その刹那」. Also used to express a way of life that values only the present moment, as in 「刹那的な快楽」.
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N1切迫せっぱく
A state in which time is short and pressing. Or a state in which a situation is tense. Used in forms like 「切迫した状況」「期限が切迫する」. A formal word frequently appearing in news reports and administrative documents.
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N1切望せつぼう
The act of wishing strongly from the depths of the heart. A formal word used in forms like 「平和を切望する」「再会を切望する」, expressing an earnest desire stronger than mere hope.
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N1絶妙ぜつみょう
Being outstandingly excellent and skillful. A formal word used in forms like 「絶妙なバランス」「絶妙のタイミング」, expressing splendor that is exactly right and irreplaceable.
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N4説明せつめい
To explain something in detail so it can be understood.
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N3節約せつやく
To reduce waste and use money or things carefully. Example: 「電気代を節約する」 (to save on electricity bills). The paired expression is 「むだづかい」 (wasteful spending).
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N4背中せなか
back. The back side of the body, from the waist to the shoulders.
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N1狭めるせばめる
The act of reducing scope, width, or difference. A formal word used in forms like 「範囲を狭める」「選択肢を狭める」, used not only for physical width but also for narrowing abstract ranges.
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N4背広せびろ
A set of jacket and trousers worn by men for work.
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N5狭いせまい
A state where a place is small. The antonym is 「広い」 (spacious).
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N1競り合うせりあう
The act of competing with one another for victory or superiority. Used in forms like 「首位を競り合う」「激しく競り合う」, in close contests of sports, business, or elections.
This word has different meanings and uses at each level
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