清浄|せいじょうseijou[0]heiban (flat)

1. na-adjective, no-adjectivepure; clean; purity
   山中さんちゅうでは空気くうきはとても清浄せいじょうだ。↗

   The air is very pure in the mountains.

• Synonym清いきよいNeutralNative adjective for something clean and untainted, as in 「清い心」; broadly usable, while 「清浄」 is more written and carries sacred or Buddhist overtones.
• Synonym清らかきよらかNeutralDescribes limpid purity with an aesthetic feel, as in 「清らかな水」; can also convey sacred cleanness, whereas 「清浄」 is the more written choice.
• Synonym清潔せいけつNeutralFocuses on hygiene and cleanliness, as in 「清潔なタオル」; also extends to upright personal conduct.
• SynonymクリーンNeutralLoanword covering clean and corruption-free, as in 「クリーンエネルギー」; at home in both casual talk and reports or explanatory writing.
• SynonymピュアNeutralLoanword for pure or innocent, with a trendy, fashionable feel; lighter in tone than the formal 「清浄」.
• Synonym無垢むくNeutralCovers innocence and being unstained, stressing purity of heart; can also refer to solid wood, a sense 「清浄」 lacks.
• RelatedきれいNeutralThe most common everyday word for pretty or clean; stresses a neat, attractive appearance rather than formal purity.
• Related純粋じゅんすいNeutralMeans unmixed and free of impurities, and by extension pure-hearted; the emphasis is on a single, unblended quality.
• Related潔白けっぱくNeutralRefers to being guiltless of wrongdoing, as in 「身の潔白を証明」; the point is innocence, not physical cleanliness.
• Related純情じゅんじょうNeutralDescribes pure, innocent feeling, mostly in romantic contexts; the emphasis is on pure emotion, a narrower sense than 「清浄」.
• Related純真じゅんしんNeutralDescribes a pure, unspoiled heart, as in 「純真な子供」; the emphasis is on childlike innocence rather than on cleanness of air or surroundings.
• Related清純せいじゅんNeutralSuggests innocence, often when describing a young girl's image; stresses purity in the sexual sense, unlike the broader 「清浄」.
• Related穢れのないけがれのないNeutralSet phrase for something free of any stain or impurity; describing that spotless state carries a religious or moral nuance.
• Antonym汚濁おだくWrittenAntonym for turbidity or pollution, especially of water; written and technical in tone, standing opposite the cleanliness of 「清浄」.
• Antonym不潔ふけつNeutralAntonym meaning dirty or unsanitary, and by extension indecent or immoral; the direct opposite of 「清浄」.

Use 「清浄」 for air, surroundings, or a mind clean and undefiled; it is written in tone, as in 「空気清浄機」 and 「六根清浄」. For everyday cleanliness say 「きれい」, for hygiene 「清潔」, and for pure, limpid beauty 「清らか」. 「清い」 and 「クリーン」 cover general cleanness, 「純粋」 and 「ピュア」 purity of substance or heart, and 「潔白」 innocence from wrongdoing. The antonyms are 「汚濁」 and 「不潔」.

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

1. 清きよらかで、汚よごれのないさま。
2. （しょうじょう）煩悩ぼんのうや罪悪ざいあくがなく心身しんしんが清きよらかなこと。