To begin a meeting or event. Example: 「開会式」 (opening ceremony), 「開会を宣言する」 (to declare the opening). The antonym is 「閉会」 (closing).
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N2改革かいかく
To fundamentally change a system or structure to make it better. A written word used in political and social contexts.
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N2快活かいかつ
「快」 means pleasant, and 「活」 means lively; together they mean pleasantly lively. It describes a character or attitude that is bright and energetic. Used in expressions like 「快活に笑う」 or 「快活な少年」, it is a positive word expressing lively brightness.
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N2階級かいきゅう
A rank on an ordered scale, fixed within an organization or a sport according to ability or achievement. As in 「軍隊の階級」「柔道の階級」, it refers to the graded steps of position. It also refers to a layer of people divided within society by status, property and the like; as in 「労働者階級」「階級社会」, it is used when speaking about society or history.
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N2海峡かいきょう
A narrow sea passage between two landmasses. Often used as part of a place name, as in 「津軽海峡」.
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N3解決かいけつ
To properly settle a problem or dispute. Example: 「事件を解決する」 (to resolve an incident), 「問題が解決した」 (the problem has been resolved).
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N1回顧かいこ
「回」 means to turn back or to reflect, and 「顧」 means to look back; the word combines two synonymous characters. It refers to looking back and recalling past events or one's own experiences. Used in expressions like 「半生を回顧する」 or 「回顧録」, it is used in formal contexts of looking back on the past.
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N2解雇かいこ
「解」 means to undo, and 「雇」 means to hire; together they mean to undo an employment relationship. It refers to a company unilaterally dismissing someone who has been employed. Used in expressions like 「解雇する」 or 「不当解雇」, in situations of the employer ending the employment relationship. Frequently appears in legal and labor contexts.
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N2介護かいご
To care for an elderly or sick person, helping with eating, bathing, moving around, and the like.
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N2外交がいこう
Building relations between countries and settling issues through talks; diplomacy. Used as in 外交官 (diplomat), 外交問題 (diplomatic issue).
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N2会合かいごう
People gathering for consultation or discussion; also, the gathering itself. Covers a wider range of formality than 会議 (meeting) and is mostly used in writing.
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N2開催かいさい
To hold and carry out a meeting, event, tournament, or the like.
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N3開始かいし
start. To begin something. Example: 「試合開始」 (the start of the match), 「販売を開始する」 (to start sales). A more formal word than 「始める」. The word with the opposite meaning is 「終了」 (end).
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N2解釈かいしゃく
Understanding and explaining the meaning of words or things in one's own way; interpretation. Used where the same thing can be understood differently by different people, as in 法律の解釈 (interpretation of the law), 良い方に解釈する (take it in a favorable way).
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N2改修かいしゅう
To repair and fix up defective parts of a building or facility. Mainly applies to structures and facilities.
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N1, N2回収かいしゅう
To collect and take back items that have already been distributed or used.
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N2怪獣かいじゅう
A huge, frightening imaginary creature that appears in stories or movies.
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N3外出がいしゅつ
To go out from one's home or workplace. Example: 「外出中」 (out at the moment), 「外出をひかえる」 (to refrain from going out).
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N2解除かいじょ
To cancel a restriction or agreement that has been set, returning to the original free state. 「警報を解除する」「契約を解除する」.
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N2解析かいせき
「解」 means to undo or break down, and 「析」 means to separate; together they mean to break apart and examine in detail. It refers to dividing a complex matter into elements and investigating its structure or content in detail. Used in expressions like 「データ解析」 or 「画像解析」, it is a formal word used in technical and research contexts.
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N3改善かいぜん
improvement. To fix something bad and make it better. Example: 「生活を改善する」 (to improve one's lifestyle), 「関係が改善する」 (relations improve). The antonym is 「改悪」 (a change for the worse).
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N2回送かいそう
(1) To move a vehicle to another location without carrying passengers or cargo. 「回送電車」. (2) To forward mail or the like that has arrived to a different address.
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N1, N2階層かいそう
(1) A stratum formed when society is divided by status or income. 「富裕階層」. (2) A structure made up of layers stacked one on another. 「階層構造」.
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N1快諾かいだく
「快」 means pleasant, and 「諾」 means to consent; together they mean to consent gladly. It refers to gladly accepting a request or offer from another. Used in expressions like 「出演を快諾する」, it is a formal word for accepting another's request with pleasure.
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N2開拓かいたく
It refers to opening up and expanding undeveloped land, or new fields and markets. Used in expressions like 「荒れ地を開拓する」, 「新市場を開拓する」, or 「販路を開拓する」, in situations of opening up for the first time a domain that no one has touched.
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N2会談かいだん
To hold formal talks with an important counterpart in an official setting. Used in political and diplomatic contexts.
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N1かいつまむかいつまむ
It refers to extracting only the key points and speaking briefly. Used in expressions like 「要点をかいつまんで話す」 or 「かいつまんで説明する」, in situations of summing up a long story to convey it briefly.
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N2改定かいてい
To newly re-establish a rule, fee, or the like. 「料金の改定」. A different word from 「改訂」, which has the same reading; this word applies to systems, prices, and the like.
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N2改訂かいてい
To correct and update the content of a book or piece of writing. 「教科書の改訂」. Easily confused with 「改定」, which has the same reading, but this word applies to books and writing.
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N3快適かいてき
comfortable. A pleasant, comfortable state. Example: 「快適な部屋」 (a comfortable room), 「快適に過ごす」 (to spend time comfortably).
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N1, N2街道かいどう
A main road connecting towns. Also used figuratively, as in 「出世街道」.
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N2介入かいにゅう
「介」 means to come between, and 「入」 means to enter; together they mean to step in between. It refers to a third party stepping in to become involved in the affairs of the parties concerned. Used in expressions like 「軍事介入」 or 「司法介入」, it is a formal word for situations of external intervention. It frequently appears in political, international relations, and organizational contexts.
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N2解任かいにん
「解」 means to undo, and 「任」 means a duty or office; together they mean to undo an office. It refers to removing a person from an office or duty to which they had been appointed. Used in expressions like 「役員を解任する」, in situations where an organization unilaterally relieves someone of office. Frequently appears in legal and organizational contexts.
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N3開発かいはつ
To create something new. To make land or ability useful. Used as in 「商品開発」 (product development), 「能力開発」 (skill development).
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N3回復かいふく
recovery. For something that had worsened to return to its former good state. Example: 「体力が回復する」 (to regain physical strength), 「景気の回復」 (economic recovery).
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N2介抱かいほう
「介」 means to help or to come between, and 「抱」 means to embrace; together they mean to come between and care for someone in one's arms. It refers to caring for a sick person, an injured person, or someone unable to move due to drunkenness. Used in expressions like 「酔った友人を介抱する」, in situations of nursing someone temporarily weakened.
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N2解明かいめい
「解」 means to unravel or to clarify, and 「明」 means to make clear; together they mean to unravel and make clear. It refers to investigating and making clear what has been unknown. Used in expressions like 「真相を解明する」 or 「事故原因の解明」, in situations of uncovering hidden facts.
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N2解約かいやく
「解」 means to undo, and 「約」 means a contract; together they mean to undo a contract. It refers to canceling a contract that has been concluded. Used in expressions like 「契約を解約する」 or 「保険を解約する」, in situations of ending an agreement that has been established.
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N1解離かいり
「解」 means to break apart and become loose, and 「離」 means to separate; the word combines two synonymous characters. It refers to something that had been gathered into one breaking apart. Used in expressions like 「組織から解離する」 or 「物質が解離して別の状態になる」, it is a formal word for situations of bonds becoming undone and separating. It is also seen in chemistry and psychology contexts.
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N1乖離かいり
A divergence or gap between two things that should naturally align. Used in expressions like 「理想と現実の乖離」 (a gap between ideal and reality) or 「世論との乖離」 (a divergence from public opinion), it refers to the distance that arises between two matters. A formal word frequently seen in editorials and critical essays.
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N1顧みるかえりみる
To look back on and reflect upon past events or one's own words and actions. Used as in「過去を顧みる」「家庭を顧みる暇もない」.
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N1省みるかえりみる
「省」 means to look back upon oneself, to reflect. It refers to looking back on one's own words and actions and reflecting. Used in expressions like 「我が身を省みる」, in the sense of inner reflection. While the same-reading 「顧みる」 is used for looking back in a broader sense, 「省みる」 carries a stronger nuance of self-reflection.
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N3替えるかえる
To stop using something up to now and switch to a different one. Example: 「シーツを替える」 (to change the sheets), 「電池を替える」 (to change the batteries). The homophone 「変える」 means to change a state or content, and 「代える」 means to have something take over a role instead; all are written differently.
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N3香りかおり
fragrance. A pleasant smell. Example: 「花の香り」 (the fragrance of flowers), 「コーヒーの香り」 (the aroma of coffee). Not used for bad smells. The verb form is 「香る」.
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N3画家がか
painter. A person whose job is painting pictures.
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N3抱えるかかえる
To hold something in one's arms as if wrapping around it. Example: 「荷物を抱える」 (to carry luggage in one's arms). Also used to mean having a trouble, as in 「問題を抱える」 (to have a problem to deal with), 「借金を抱える」 (to be carrying debt).
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N3価格かかく
price. The price of a good. Example: 「価格が上がる」 (the price rises), 「販売価格」 (selling price). More formal than 「値段」, used in business and news.
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N3化学かがく
chemistry. The study of the properties and changes of substances. Example: 「化学反応」 (chemical reaction), 「化学製品」 (chemical products). To distinguish it from the homophone 「科学」 (science), it is sometimes pronounced 「ばけがく」 in speech.
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N3輝くかがやく
shine. To glitter and sparkle. Example: 「星が輝く」 (stars shine). Also used to mean looking full of life, as in 「目が輝く」 (one's eyes sparkle), 「輝かしい成績」 (a brilliant record).
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N3係かかり
The person in charge of a certain task. Example: 「案内係」 (an information attendant), 「係の人に聞く」 (to ask the person in charge). Also forms compound words like 「係員」 (staff member) and 「係長」 (section chief).
This word has different meanings and uses at each level
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