単純|たんじゅんtanjun[0]heiban (flat)

1. na-adjective, nounsimple; plain; uncomplicated; straightforward; simple-minded; naive
   彼かれの話はなしは単純たんじゅんそのものだった。↗

   His story was simplicity itself.

• Synonym簡単かんたんNeutralEmphasizes that something is easy to do, as in 「簡単な問題」; 「単純」 stresses uncomplicated structure and can also suggest a simple mind.
• SynonymプレーンNeutralLoanword for plain or unflavored, as in 「プレーンヨーグルト」; used mostly for food and design.
• Synonym簡易かんいNeutralMeans simple and easy to use, usually as a modifier in 「簡易トイレ」 or 「簡易書留」; favors facilities and procedures.
• SynonymシンプルNeutralLoanword for clean and uncluttered, as in 「シンプルなデザイン」; usually complimentary, while 「単純」 can sound critical.
• Synonym安直あんちょくNeutralSuggests taking the easy way too readily, as in 「安直な考え」; carries a negative tone.
• Synonym簡略かんりゃくNeutralRefers to leaving out cumbersome parts, as in 「手続きを簡略化する」; stresses omission rather than structure.
• Synonym単簡たんかんWrittenWritten-style word for simple; rarely seen in modern usage.
• Related簡便かんべんWrittenMeans simple and handy, as in 「簡便な方法」; written register, stressing convenience of use.
• Related簡明かんめいWrittenConcise and clear, as in 「簡明に説明する」; used mainly for explanations and writing.
• Antonym複雑ふくざつNeutralAntonym: things so entangled they are hard to grasp; the direct opposite of 「単純」.
• Antonym煩雑はんざつWrittenWritten-style word for fussy, cumbersome things; the opposite of the simplicity of 「単純」.

Use 「単純」 for something structurally uncomplicated or a simple mind. Say 「簡単」 when something is easy to do, 「シンプル」 for clean design, 「簡易」 for simplified facilities, and 「安直」 for lazily cutting corners; 「複雑」 is the opposite.

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

1. 構造こうぞうや形式けいしきなどが込み入こみいっていないこと。
2. 他ほかの要素ようそが混まざっていないこと。
3. 条件じょうけんや制限せいげんのないこと。
4. 考え方かんがえかたや人ひとの性格せいかくなどが簡単かんたんで明快めいかいなさま。また単調たんちょうであさはかなさま。