静穏|せいおんseion[0]heiban (flat)

1. noun, na-adjectivetranquility; tranquillity; calmness; serenity; quietness
   静穏せいおんは大おおきな宝物たからものである。↗

   Quietness is a great treasure.

• Synonym平静へいせいWrittenWritten style. Covers a calm mind or calm conditions, as in 「平静を装う」「平静な海」; 「静穏」 is mostly about the environment or society.
• Synonym平穏へいおんNeutralRefers to being smooth and untroubled, as in 「平穏な日々」. Close to 「静穏」 but more common in everyday use.
• Synonym安穏あんのんWrittenWritten. Suggests living in ease and comfort, as in 「安穏な暮らし」; centers on one's life rather than quiet surroundings.
• Synonym平安へいあんWrittenWritten and slightly old-fashioned. Means being safe and free of mishap; also names the Heian period.
• Synonym安らかやすらかNeutralDescribes a peaceful state, often a person's, as in 「安らかに眠る」; carries a warm, tender nuance.
• Synonym安静あんせいNeutralMeans rest and stillness for recovery, as in 「絶対安静」; typically a patient resting in bed.
• Synonym安らぎやすらぎNeutralRefers to inner peace as a feeling, as in 「心の安らぎ」; about emotional comfort, not surroundings.
• Synonym穏やかおだやかNeutralCovers mildness and calm, mainly of weather and personality; very common, while 「静穏」 leans written and legal.
• Synonym静かしずかNeutralThe most general word for quiet, focused on little noise; 「静穏」 additionally implies things running smoothly.
• SynonymのどかNeutralSuggests leisurely, idyllic calm, as in 「のどかな田園風景」; carries a rural, unhurried feel.
• Synonym落ち着いたおちついたNeutralDescribes composure in people, attitudes or atmosphere, as in 「落ち着いた人」; 「静穏」 mostly describes settings.
• Synonym無風むふうNeutralLiterally windless or calm seas; also metaphorically for an uneventful, controversy-free election.
• Related安泰あんたいWrittenWritten. Means security of one's position or an organization, as in 「お家安泰」; not used of a quiet environment.
• Related太平たいへいWrittenWritten. Means the world being at peace and society stable; a different scope from 「静穏」.
• Related平和へいわNeutralMeans peace as opposed to war; the most general word, but does not specifically mean quiet.
• Related無事ぶじNeutralMeans being safe with nothing having gone wrong, as in 「無事に帰る」; about the absence of trouble, not quiet.
• Related温和おんわNeutralMeans mildness, mainly of climate and personality, as in 「温和な気候」.
• Related安寧あんねいFormalFormal. Denotes an orderly, peaceful society, as in 「社会の安寧」; typical of official documents.
• Related天下泰平てんかたいへいNeutralFour-character term for a world at peace; also used jokingly of a carefree, easygoing mood, as in 「天下泰平だね」.
• RelatedのどやかWrittenWritten and rare. Suggests leisurely serenity with a pastoral, idyllic feel.
• Related静謐せいひつWrittenWritten with a solemn tone; very close to 「静穏」, covering both quiet and a settled state of the world.
• Related寧静ねいせいWrittenWritten and rare. Refers to inner calm of mind rather than external quiet.
• Related平和的へいわてきNeutralMeans peaceful in the sense of non-violent, as in 「平和的解決」; describes means or attitudes.
• Related康寧こうねいWrittenFormal. Wishes of health and tranquility, mostly in letter greetings; rare elsewhere.
• Antonym騒然そうぜんWrittenAntonym. Written. Uproar and unrest, as in 「場内騒然」; the direct opposite of 「静穏」.
• Antonym騒々しいそうぞうしいNeutralAntonym. Noisy and unsettled, as in 「騒々しい世の中」; the opposite of 「静穏」.
• Antonym荒れ狂うあれくるうNeutralAntonym. To rage or run wild, as in 「荒れ狂う海」; the opposite of the calm 「静穏」 describes.

For calm, untroubled conditions say 「平穏」 or 「穏やか」, and for simple quietness say 「静か」. 「静穏」 is written, legal-flavored style for a quiet environment and society, as in 「静穏な住環境」. Use 「平和」 for peace versus war, 「無事」 for coming through safely, 「安らぎ」 or 「安らか」 for peace of mind, 「安静」 for a patient's rest, and formal 「安寧」 for social order. For noise and uproar the antonyms are 「騒々しい」 and written 「騒然」.

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

1. 静しずかで穏おだやかなこと。また、そのようなさま。