簡単・簡短|かんたんkantan[0]heiban (flat)

1. na-adjective, nounsimple; easy; uncomplicated
   テニスをすることは私には簡単かんたんだ。↗

   Playing tennis is easy for me.
2. na-adjective, nounbrief; quick; light

• SynonymやさしいNeutralSuggests content is easy to understand, as in 「易しい問題」; 「簡単」 also covers simple structure or brief procedures.
• SynonymやすいNeutralMostly a suffix 「〜やすい」 meaning easy to do or likely to happen, as in 「読みやすい」; as a standalone predicate 「簡単」 is the usual choice.
• Synonym簡易かんいNeutralCovers simplified, stripped-down forms, as in 「簡易ベッド」「操作が簡易だ」; mostly a modifier stressing simplified form, more written than 「簡単」.
• SynonymシンプルNeutralLoanword for clean, uncluttered design or style, as in 「シンプルな部屋」; does not mean easy to do.
• Synonym単純たんじゅんNeutralRefers to simple structure or simple-mindedness, as in 「単純作業」「単純な人」, sometimes derogatory; 「簡単」 usually means easy.
• SynonymたやすいWrittenMeans effortlessly easy, as in 「たやすく手に入る」; written-flavoured, while 「簡単」 is the everyday word and also covers simple structure.
• Synonym平易へいいWrittenWritten word for plain, easy-to-follow writing or explanations, as in 「平易な言葉」; 「簡単」 has much wider use.
• Synonym容易よういWrittenWritten and formal for easy to accomplish, often 「容易に」「容易ではない」; does not describe simple structure.
• Synonym手軽てがるNeutralMeans handy and hassle-free, as in 「手軽な料理」; stresses little time, effort or cost, while 「簡単」 stresses low difficulty.
• Synonym楽らくNeutralStresses physical or mental ease, as in 「楽な仕事」, and can mean a comfortable life; 「簡単」 is about low difficulty, not comfort.
• Synonym簡便かんべんWrittenWritten word for simple and convenient, as in 「簡便な方法」; stresses convenience and practicality.
• SynonymイージーCasualColloquial loanword for easy, also careless or sloppy, as in 「イージーミス」; for everyday 'easy' 「簡単」 is standard.
• Synonym簡略かんりゃくWrittenWritten word for cutting out complexity, as in 「手続きの簡略化」「簡略な説明」; about streamlining, not difficulty.
• SynonymプレーンCasualColloquial loanword mostly for plain flavour or no frills, as in 「プレーンヨーグルト」; does not mean easy.
• Synonym安直あんちょくCasualCritical word for taking the easy way, overly simplistic, as in 「安直な発想」; 「簡単」 itself carries no negative shade.
• Synonym生易しいなまやさしいWrittenMostly with a negative, as in 「生易しいものではない」, stressing that something is far from easy; affirmative use goes to 「簡単」.
• Synonym造作ないぞうさないWrittenMeans taking no trouble, easily done; an old-fashioned tone, often as 「造作なく」. In everyday speech 「簡単」 is the norm.
• SynonymわけないCasualColloquial for requiring no effort at all, as in 「訳無くできる」; also means impossible, a sense 「簡単」 lacks.
• Synonym軽易けいいWrittenFormal written word for light and easy, seen mainly in official documents, as in 「軽易な業務」; say 「簡単」 in daily life.
• Synonym楽チンらくチンCasualSlangy word for easy and comfortable, as in 「楽チンな靴」; casual tone — use 「楽」 or 「簡単」 in formal settings.
• Related簡素かんそNeutralMeans plain and unadorned, as in 「簡素な結婚式」; positive or neutral, but never means easy.
• RelatedたわいないCasualColloquial for childish or trivial, also losing easily, as in 「他愛なく負ける」; usually carries a dismissive tone.
• Antonym複雑ふくざつNeutralAntonym for intricate, tangled things, as in 「複雑な事情」; contrasts with 「簡単」 in structural complexity.
• Antonym困難こんなんWrittenWritten-flavoured antonym for hard to carry out, as in 「実現は困難だ」; contrasts with 「簡単」 in difficulty.

For 'simple' or 'easy', 「簡単」 is the default. Use 「易しい」 for easy-to-understand content, 「単純」 for simple structure, 「手軽」 for hassle-free convenience, and 「楽」 for feeling no strain. The antonyms are 「複雑」 (structurally tangled) and 「困難」 (hard to do).

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

1. つくり･構成こうせいが込み入こみいっておらず単純たんじゅんである。
2. 行おこなうのに容易よういである、やさしい。