機構|きこうkikou[0]heiban (flat)

1. nounmechanism; machinery
   どこか機構きこうが悪わるいに違ちがいない。↗

   Something must be wrong with the machinery.
2. nounsystem; structure; organization; framework
   ＷＨＯとは世界せかい保健ほけん機構きこうを表あらわす。↗

   WHO stands for World Health Organization.

• SynonymメカニズムNeutralA loanword for how something works — the operating mechanism or principle, as in 「発病のメカニズム」. 「機構」 can also mean the organization or institution itself.
• Synonym仕組みしくみNeutralCovers both structure and how something operates, as in 「社会の仕組み」; common in everyday speech. 「機構」 is more formal and can also denote an organization.
• Synonym仕掛けしかけNeutralA device or contrivance, and by extension a trick or trap, as in 「種も仕掛けもない」. 「機構」 refers to a formal structure or organization.
• SynonymシステムNeutralA loanword for a system, framework or institution; common in speech. 「機構」 is more formal and mostly means an institution or mechanical construction.
• Synonym体系たいけいNeutralA whole unified under a set of principles, as in 「理論体系」 or 「医療体系」. 「機構」 centers on organizational or mechanical structure.
• Synonym機序きじょWrittenA formal written term for how something acts, used mostly in medicine and pharmacology, as in 「作用機序」. 「機構」 has a much wider range.
• Related組織そしきNeutralA group formed for a common purpose; the focus is on the people gathered. 「機構」 stresses an institutionalized body or overall structure.
• Related機関きかんNeutralRead 「からくり」 and usually written in kana: an ingenious moving device or a behind-the-scenes trick. 「機構」 is a formal structure or organization, with no sense of trickery.
• Related団体だんたいNeutralA collection of people with a shared purpose, as in 「市民団体」; the emphasis is on the members. 「機構」 stresses the institutionalized body.
• RelatedからくりNeutralAn ingenious mechanical device, as in 「からくり時計」, or a behind-the-scenes trick or gambit. 「機構」 means only a structure or organization, with no hint of trickery.
• RelatedオーガニゼーションNeutralKatakana loanword for an organization or institution, rarely used in daily life; 「組織」 or 「機構」 is the usual choice.
• RelatedストラクチャNeutralLoanword for structure or construction, seen mostly in specialist fields such as IT and architecture. 「機構」 covers both organization and mechanism.

Choose 「機構」 for a formal organization or institutional framework, as in 「行政機構」, or for a mechanical construction. For how something works, say 「仕組み」 or 「メカニズム」; for a group of people, 「組織」 or 「団体」. The rest cover devices and tricks, medical mechanisms, or specialist and loanword terms.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物事ものごとが組み立くみたてられている仕組しくみ。
2. 機械きかいの内部ないぶにおける仕組しくみ。メカニズム。
3. 団体だんたい、会社かいしゃ、官庁かんちょうなどの組織そしき。