謀議|ぼうぎbougi[1]atamadaka (head-high)

1. noun, suru verb, transitive verbplot; conspiracy; conference
   彼かれは絶対ぜったいにその謀議ぼうぎに加担かたんしていなかった。反はん政府せいふの悪わるだくみがあったのは、彼かれではなくて、その兄あにだった。↗

   He has had absolutely no part in the conspiracy; it was not he, but his brother, who had an axe to grind against the government.

• Synonym共謀きょうぼうWrittenWritten register. Several people plotting together; common in legal contexts, as in 「共謀罪」. 「謀議」 stresses the process of gathering to confer and plan.
• Synonym陰謀いんぼうNeutralNeutral. A conspiracy, as in 「陰謀論」; points to the plot itself, not the process of conferring.
• Synonym図るはかるNeutralNeutral verb. To seek or work for something, as in 「便宜を図る」; can be favorable or underhanded.
• Synonym共同謀議きょうどうぼうぎFormalFormal legal term for several people conspiring to commit a crime; the charge at the Tokyo war crimes trials was 「共同謀議」.
• Synonym密謀みつぼうWrittenWritten but rare. Secret plotting; stresses the secrecy rather than a group conferring together.
• Related謀はかりごとWrittenWritten and old-fashioned. A stratagem or scheme, as in 「謀をめぐらす」; no sense of people conferring together.
• Related企てくわだてNeutralNeutral. A plan or attempt, large or small; not necessarily something bad plotted by several people.
• Related策謀さくぼうWrittenWritten, with a negative tinge. Scheming and maneuvering; stresses the tactics used, not a group meeting to confer.
• Related魂胆こんたんCasualColloquial. A hidden ulterior motive, as in 「魂胆が見え見え」; centers on one person's secret intent.
• Related画策かくさくWrittenWritten, usually derogatory. Working behind the scenes, as in 「裏で画策する」; stresses the acting, not the conferring.
• Related企みたくらみNeutralNeutral. A bad scheme hatched in secret; leans toward one person's scheming, as in 「企みを見抜く」.
• Related悪巧みわるだくみCasualColloquial. A wicked scheme, as in 「悪巧みをする」; usable even for seriously bad deeds.
• Related密計みっけいWrittenWritten but rare. A secret plan; points to the plan itself, with no sense of people conferring.
• Related謀計ぼうけいWrittenWritten but rare. A sinister scheme; points to the scheme itself rather than any plotting process.

Use 「謀議」 for the process of people gathering to plot something bad, as in 「謀議を凝らす」. For plotting jointly, 「共謀」 (common in legal contexts) or the formal 「共同謀議」; for a conspiracy itself, 「陰謀」; colloquially, 「悪巧み」. Most of the rest name the plan or scheme itself rather than the conferring.

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

1. 計画けいかく、謀はかりごとを相談そうだんすること。